added Bacteria monster to Backrooms game with camouflage mechanics, lure sounds, and sprinting behavior

Reviewed-on: #14
Reviewed-by: Lars Neuhaus <larslukasneuhaus@gmx.de>

.gitignore

@@ -1,3 +1,120 @@
+# Created by https://www.toptal.com/developers/gitignore/api/gradle,intellij,java
+# Edit at https://www.toptal.com/developers/gitignore?templates=gradle,intellij,java
+
+### Intellij ###
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/**/usage.statistics.xml
+.idea/**/dictionaries
+.idea/**/shelf
+
+# AWS User-specific
+.idea/**/aws.xml
+
+# Generated files
+.idea/**/contentModel.xml
+
+# Sensitive or high-churn files
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+.idea/**/dbnavigator.xml
+
+# Gradle
+.idea/**/gradle.xml
+.idea/**/libraries
+
+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
+# since they will be recreated, and may cause churn.  Uncomment if using
+# auto-import.
+# .idea/artifacts
+# .idea/compiler.xml
+# .idea/jarRepositories.xml
+# .idea/modules.xml
+# .idea/*.iml
+# .idea/modules
+# *.iml
+# *.ipr
+
+# CMake
+cmake-build-*/
+
+# Mongo Explorer plugin
+.idea/**/mongoSettings.xml
+
+# File-based project format
+*.iws
+
+# IntelliJ
+out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# SonarLint plugin
+.idea/sonarlint/
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+# Editor-based Rest Client
+.idea/httpRequests
+
+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser
+
+### Intellij Patch ###
+# Comment Reason: https://github.com/joeblau/gitignore.io/issues/186#issuecomment-215987721
+
+# *.iml
+# modules.xml
+# .idea/misc.xml
+# *.ipr
+
+# Sonarlint plugin
+# https://plugins.jetbrains.com/plugin/7973-sonarlint
+.idea/**/sonarlint/
+
+# SonarQube Plugin
+# https://plugins.jetbrains.com/plugin/7238-sonarqube-community-plugin
+.idea/**/sonarIssues.xml
+
+# Markdown Navigator plugin
+# https://plugins.jetbrains.com/plugin/7896-markdown-navigator-enhanced
+.idea/**/markdown-navigator.xml
+.idea/**/markdown-navigator-enh.xml
+.idea/**/markdown-navigator/
+
+# Cache file creation bug
+# See https://youtrack.jetbrains.com/issue/JBR-2257
+.idea/$CACHE_FILE$
+
+# CodeStream plugin
+# https://plugins.jetbrains.com/plugin/12206-codestream
+.idea/codestream.xml
+
+# Azure Toolkit for IntelliJ plugin
+# https://plugins.jetbrains.com/plugin/8053-azure-toolkit-for-intellij
+.idea/**/azureSettings.xml
+
+### Java ###
 # Compiled class file
 *.class
 
@@ -23,8 +140,35 @@
 hs_err_pid*
 replay_pid*
 
-.idea
+### Gradle ###
 .gradle
-build/*
+**/build/
+!src/**/build/
+
+# Ignore Gradle GUI config
+gradle-app.setting
+
+# Avoid ignoring Gradle wrapper jar file (.jar files are usually ignored)
+!gradle-wrapper.jar
+
+# Avoid ignore Gradle wrappper properties
+!gradle-wrapper.properties
+
+# Cache of project
+.gradletasknamecache
+
+# Eclipse Gradle plugin generated files
+# Eclipse Core
+.project
+# JDT-specific (Eclipse Java Development Tools)
+.classpath
+
+### Gradle Patch ###
+# Java heap dump
+*.hprof
+
+# End of https://www.toptal.com/developers/gitignore/api/gradle,intellij,java
 
 /resources/
+/build/
+/bin/

.idea/.gitignore

@@ -0,0 +1,3 @@
+# Default ignored files
+/shelf/
+/workspace.xml

.idea/codeStyles/Project.xml

@@ -0,0 +1,16 @@
+<component name="ProjectCodeStyleConfiguration">
+  <code_scheme name="Project" version="173">
+    <codeStyleSettings language="JAVA">
+      <option name="SPACE_BEFORE_IF_PARENTHESES" value="false" />
+      <option name="SPACE_BEFORE_WHILE_PARENTHESES" value="false" />
+      <option name="SPACE_BEFORE_FOR_PARENTHESES" value="false" />
+      <option name="SPACE_BEFORE_TRY_PARENTHESES" value="false" />
+      <option name="SPACE_BEFORE_CATCH_PARENTHESES" value="false" />
+      <option name="SPACE_BEFORE_SWITCH_PARENTHESES" value="false" />
+      <option name="SPACE_BEFORE_SYNCHRONIZED_PARENTHESES" value="false" />
+      <indentOptions>
+        <option name="CONTINUATION_INDENT_SIZE" value="4" />
+      </indentOptions>
+    </codeStyleSettings>
+  </code_scheme>
+</component>

.idea/codeStyles/codeStyleConfig.xml

@@ -0,0 +1,5 @@
+<component name="ProjectCodeStyleConfiguration">
+  <state>
+    <option name="USE_PER_PROJECT_SETTINGS" value="true" />
+  </state>
+</component>

.idea/compiler.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <bytecodeTargetLevel target="21" />
+  </component>
+  <component name="JavacSettings">
+    <option name="ADDITIONAL_OPTIONS_OVERRIDE">
+      <module name="Minigames" options="-Xlint:deprecation" />
+      <module name="Minigames.test" options="-Xlint:deprecation" />
+      <module name="eu.mhsl.minenet.Minigames.main" options="-Xlint:deprecation" />
+    </option>
+  </component>
+</project>

.idea/inspectionProfiles/Project_Default.xml

@@ -0,0 +1,7 @@
+<component name="InspectionProjectProfileManager">
+  <profile version="1.0">
+    <option name="myName" value="Project Default" />
+    <inspection_tool class="UnqualifiedFieldAccess" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="UnqualifiedMethodAccess" enabled="true" level="WARNING" enabled_by_default="true" />
+  </profile>
+</component>

.idea/jarRepositories.xml

@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RemoteRepositoriesConfiguration">
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Maven Central repository" />
+      <option name="url" value="https://repo1.maven.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="jboss.community" />
+      <option name="name" value="JBoss Community repository" />
+      <option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="maven3" />
+      <option name="name" value="maven3" />
+      <option name="url" value="https://oss.sonatype.org/content/repositories/snapshots" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="MavenRepo" />
+      <option name="name" value="MavenRepo" />
+      <option name="url" value="https://repo.maven.apache.org/maven2/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="maven2" />
+      <option name="name" value="maven2" />
+      <option name="url" value="https://repo.unnamed.team/repository/unnamed-public/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="maven4" />
+      <option name="name" value="maven4" />
+      <option name="url" value="https://jitpack.io" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="Google" />
+      <option name="name" value="Google" />
+      <option name="url" value="https://dl.google.com/dl/android/maven2/" />
+    </remote-repository>
+  </component>
+</project>

.idea/misc.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_25" default="true" project-jdk-name="openjdk-25" project-jdk-type="JavaSDK" />
+</project>

.idea/modules.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/Minigames.main.iml" filepath="$PROJECT_DIR$/.idea/modules/Minigames.main.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/Minigames.test.iml" filepath="$PROJECT_DIR$/.idea/modules/Minigames.test.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/eu.mhsl.minenet.Minigames.main.iml" filepath="$PROJECT_DIR$/.idea/modules/eu.mhsl.minenet.Minigames.main.iml" />
+    </modules>
+  </component>
+</project>

.idea/modules/Minigames.main.iml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module version="4">
+  <component name="FacetManager">
+    <facet type="minecraft" name="Minecraft">
+      <configuration>
+        <autoDetectTypes>
+          <platformType>ADVENTURE</platformType>
+        </autoDetectTypes>
+        <projectReimportVersion>1</projectReimportVersion>
+      </configuration>
+    </facet>
+  </component>
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

.idea/modules/Minigames.test.iml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module version="4">
+  <component name="FacetManager">
+    <facet type="minecraft" name="Minecraft">
+      <configuration>
+        <autoDetectTypes>
+          <platformType>ADVENTURE</platformType>
+        </autoDetectTypes>
+        <projectReimportVersion>1</projectReimportVersion>
+      </configuration>
+    </facet>
+  </component>
+</module>

.idea/modules/eu.mhsl.minenet.Minigames.main.iml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module version="4">
+  <component name="FacetManager">
+    <facet type="minecraft" name="Minecraft">
+      <configuration>
+        <autoDetectTypes>
+          <platformType>ADVENTURE</platformType>
+        </autoDetectTypes>
+        <projectReimportVersion>1</projectReimportVersion>
+      </configuration>
+    </facet>
+  </component>
+</module>

.idea/modules/eu.mhsl.minenet.Minigames.test.iml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module version="4">
+  <component name="FacetManager">
+    <facet type="minecraft" name="Minecraft">
+      <configuration>
+        <autoDetectTypes>
+          <platformType>ADVENTURE</platformType>
+        </autoDetectTypes>
+        <projectReimportVersion>1</projectReimportVersion>
+      </configuration>
+    </facet>
+  </component>
+</module>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>

build.gradle

@@ -3,7 +3,7 @@
 
 plugins {
     id 'java'
-    id "com.github.johnrengelman.shadow" version "7.1.0"
+    id "com.gradleup.shadow" version "9.6.0"
 }
 
 group 'eu.mhsl.minenet'
@@ -11,58 +11,33 @@ version '1.0-SNAPSHOT'
 
 repositories {
     mavenCentral()
-    google()
-
-    maven {
-        url 'https://jitpack.io'
-    }
-
-    maven {
-        url "https://repo.unnamed.team/repository/unnamed-public/"
-    }
-
-    maven {
-        url 'https://oss.sonatype.org/content/repositories/snapshots'
-    }
 }
 
-allprojects {
-    repositories {
-        maven { url "https://jitpack.io" }
-    }
-}
-
-
 java {
     toolchain {
-        languageVersion = JavaLanguageVersion.of(21)
+        languageVersion = JavaLanguageVersion.of(25)
     }
 }
 
 dependencies {
-    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.9.0'
+    testImplementation 'org.junit.jupiter:junit-jupiter:6.1.2'
-    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.9.0'
+    testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
 
-    //https://jitpack.io/#Minestom/Minestom
+    //https://mvnrepository.com/artifact/net.minestom/minestom
-    implementation 'net.minestom:minestom-snapshots:fd51c8d17a'
+    implementation 'net.minestom:minestom:2026.07.12-26.2'
 
     //Tools
-    implementation 'de.articdive:jnoise:3.0.2'
+    implementation 'de.articdive:jnoise-pipeline:4.1.0'
+    compileOnly 'it.unimi.dsi:fastutil:8.5.18' // von Minestom nur zur Laufzeit bereitgestellt, fuer BatchUtil-Reflection benoetigt
     implementation 'net.md-5:bungeecord-config:1.21-R0.3'
-    implementation 'org.apache.commons:commons-text:1.10.0'
+    implementation 'org.apache.commons:commons-text:1.15.0'
-    implementation 'org.spongepowered:configurate-yaml:4.1.2'
+    implementation 'org.spongepowered:configurate-yaml:4.2.0'
     implementation 'com.sparkjava:spark-core:2.9.4'
-    implementation 'com.google.code.gson:gson:2.10.1'
+    implementation 'com.google.code.gson:gson:2.14.0'
-    implementation 'com.google.guava:guava:32.0.1-android'
+    implementation 'com.google.guava:guava:33.4.8-jre'
-
 
     //PvP
-    implementation 'io.github.TogAr2:MinestomPvP:PR62-SNAPSHOT'
+    implementation 'io.github.togar2:MinestomPvP:2026.05.30-26.1.1'
-
-    // Hephaestus engine
-    implementation("team.unnamed:hephaestus-api:0.2.1-SNAPSHOT")
-    implementation("team.unnamed:hephaestus-reader-blockbench:0.2.1-SNAPSHOT")
-    implementation("team.unnamed:hephaestus-runtime-minestom:0.2.1-SNAPSHOT")
 }
 
 tasks {
@@ -71,8 +46,6 @@ tasks {
             attributes 'Main-Class': 'eu.mhsl.minenet.minigames.Main'
             attributes 'Multi-Release': true
         }
-        duplicatesStrategy = 'exclude'
-        from configurations.compileClasspath.collect { it.isDirectory() ? it : zipTree(it) }
     }
     build {
         dependsOn(shadowJar)
@@ -89,3 +62,7 @@ tasks.register('copyJarToServer', Exec) {
 
     commandLine 'scp', 'build/libs/Minigames-1.0-SNAPSHOT.jar', 'root@10.20.6.5:/root/minigames'
 }
+
+tasks.withType(JavaCompile) {
+    options.compilerArgs << "-Xlint:deprecation"
+}

gradle/wrapper/gradle-wrapper.properties

@@ -1,7 +1,9 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.10-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.6.1-bin.zip
 networkTimeout=10000
+retries=0
+retryBackOffMs=500
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

gradlew

@@ -1,7 +1,7 @@
 #!/bin/sh
 
 #
-# Copyright © 2015-2021 the original authors.
+# Copyright © 2015 the original authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -20,7 +20,7 @@
 
 ##############################################################################
 #
-#   Gradle start up script for POSIX generated by Gradle.
+#   gradlew start up script for POSIX generated by Gradle.
 #
 #   Important for running:
 #
@@ -29,7 +29,7 @@
 #       bash, then to run this script, type that shell name before the whole
 #       command line, like:
 #
-#           ksh Gradle
+#           ksh gradlew
 #
 #       Busybox and similar reduced shells will NOT work, because this script
 #       requires all of these POSIX shell features:
@@ -57,7 +57,7 @@
 #       Darwin, MinGW, and NonStop.
 #
 #   (3) This script is generated from the Groovy template
-#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       https://github.com/gradle/gradle/blob/3d91ce3b8caaf77ad09f381f43615b715b53f72c/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
 #       within the Gradle project.
 #
 #       You can find Gradle at https://github.com/gradle/gradle/.
@@ -86,8 +86,7 @@ done
 # shellcheck disable=SC2034
 APP_BASE_NAME=${0##*/}
 # Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
-APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
-' "$PWD" ) || exit
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD=maximum
@@ -115,7 +114,6 @@ case "$( uname )" in                #(
   NONSTOP* )        nonstop=true ;;
 esac
 
-CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 
 
 # Determine the Java command to use to start the JVM.
@@ -173,7 +171,6 @@ fi
 # For Cygwin or MSYS, switch paths to Windows format before running java
 if "$cygwin" || "$msys" ; then
     APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
-    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
 
     JAVACMD=$( cygpath --unix "$JAVACMD" )
 
@@ -206,15 +203,14 @@ fi
 DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 
 # Collect all arguments for the java command:
-#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
 #     and any embedded shellness will be escaped.
 #   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
 #     treated as '${Hostname}' itself on the command line.
 
 set -- \
         "-Dorg.gradle.appname=$APP_BASE_NAME" \
-        -classpath "$CLASSPATH" \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
-        org.gradle.wrapper.GradleWrapperMain \
         "$@"
 
 # Stop when "xargs" is not available.

gradlew.bat

@@ -19,12 +19,12 @@
 @if "%DEBUG%"=="" @echo off
 @rem ##########################################################################
 @rem
-@rem  Gradle startup script for Windows
+@rem  gradlew startup script for Windows
 @rem
 @rem ##########################################################################
 
-@rem Set local scope for the variables with windows NT shell
+@rem Set local scope for the variables, and ensure extensions are enabled
-if "%OS%"=="Windows_NT" setlocal
+setlocal EnableExtensions
 
 set DIRNAME=%~dp0
 if "%DIRNAME%"=="" set DIRNAME=.
@@ -51,7 +51,7 @@ echo. 1>&2
 echo Please set the JAVA_HOME variable in your environment to match the 1>&2
 echo location of your Java installation. 1>&2
 
-goto fail
+"%COMSPEC%" /c exit 1
 
 :findJavaFromJavaHome
 set JAVA_HOME=%JAVA_HOME:"=%
@@ -65,30 +65,18 @@ echo. 1>&2
 echo Please set the JAVA_HOME variable in your environment to match the 1>&2
 echo location of your Java installation. 1>&2
 
-goto fail
+"%COMSPEC%" /c exit 1
 
 :execute
 @rem Setup the command line
 
-set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
 
 
-@rem Execute Gradle
+@rem Execute gradlew
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+@rem endlocal doesn't take effect until after the line is parsed and variables are expanded
+@rem which allows us to clear the local environment before executing the java command
+endlocal & "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %* & call :exitWithErrorLevel
 
-:end
+:exitWithErrorLevel
-@rem End local scope for the variables with windows NT shell
+@rem Use "%COMSPEC%" /c exit to allow operators to work properly in scripts
-if %ERRORLEVEL% equ 0 goto mainEnd
+"%COMSPEC%" /c exit %ERRORLEVEL%
-
-:fail
-rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
-rem the _cmd.exe /c_ return code!
-set EXIT_CODE=%ERRORLEVEL%
-if %EXIT_CODE% equ 0 set EXIT_CODE=1
-if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
-exit /b %EXIT_CODE%
-
-:mainEnd
-if "%OS%"=="Windows_NT" endlocal
-
-:omega

src/main/java/eu/mhsl/minenet/minigames/Main.java

@@ -3,12 +3,12 @@ package eu.mhsl.minenet.minigames;
 import eu.mhsl.minenet.minigames.api.HttpServer;
 import eu.mhsl.minenet.minigames.command.Commands;
 import eu.mhsl.minenet.minigames.handler.Listeners;
+import eu.mhsl.minenet.minigames.instance.Dimension;
 import eu.mhsl.minenet.minigames.lang.Languages;
 import eu.mhsl.minenet.minigames.server.tasks.TablistUpdateTask;
+import net.minestom.server.Auth;
 import net.minestom.server.MinecraftServer;
-import net.minestom.server.extras.bungee.BungeeCordProxy;
 import net.minestom.server.extras.lan.OpenToLAN;
-import net.minestom.server.extras.velocity.VelocityProxy;
 import net.minestom.server.timer.TaskSchedule;
 import org.spongepowered.configurate.ConfigurateException;
 import org.spongepowered.configurate.ConfigurationNode;
@@ -24,27 +24,45 @@ public class Main {
     private final static Logger logger = Logger.getGlobal();
     public static ConfigurationNode globalConfig;
 
-    public static void main(String[] args) throws ConfigurateException {
+    @SuppressWarnings("ResultOfMethodCallIgnored")
+    static void main(String[] args) throws ConfigurateException {
         //noinspection ResultOfMethodCallIgnored
         Resource.values(); // This initializes and preloads the enum and extracts the resources
         Languages.getInstance(); //Preload languages into the jvm
 
         globalConfig = YamlConfigurationLoader
-                .builder()
+            .builder()
-                .path(Resource.CONFIG.getPath())
+            .path(Resource.CONFIG.getPath())
-                .build()
+            .build()
-                .load();
+            .load();
 
         ConfigurationNode serverConfig = globalConfig.node("server");
 
+        // muss vor MinecraftServer.init() gesetzt werden: ServerFlag liest die Properties statisch beim Klassenladen;
+        // bei fehlendem/ungueltigem Config-Wert den Minestom-Default behalten (0 wuerde keine Chunks senden)
+        int viewDistance = serverConfig.node("view-distance").getInt(0);
+        if(viewDistance > 0) {
+            System.setProperty("minestom.chunk-view-distance", String.valueOf(viewDistance));
+        }
+
         logger.info("Initialize Minecraft server...");
 
-        MinecraftServer server = MinecraftServer.init();
+        Auth auth = new Auth.Offline();
+        if(globalConfig.node("bungeecord", "enabled").getBoolean()) {
+            auth = new Auth.Bungee();
+        } else if(globalConfig.node("velocity", "enabled").getBoolean()) {
+            auth = new Auth.Velocity(Objects.requireNonNull(globalConfig.node("velocity", "secret").getString()));
+        }
+
+        MinecraftServer server = MinecraftServer.init(auth);
 //        MinestomPvP.init();
 
+        // Dimensionen muessen vor server.start() registriert werden:
+        // seit Minestom 26.x sind die dynamischen Registries nach dem Start eingefroren
+        Dimension.values();
+
         MinecraftServer.setBrandName("mhsl.eu - minenet - credits to minestom");
         MinecraftServer.setCompressionThreshold(serverConfig.node("compression-threshold").getInt(0));
-        System.setProperty("minestom.chunk-view-distance", String.valueOf(serverConfig.node("view-distance").getInt()));
 
         Commands.values();
         Listeners.values();
@@ -56,12 +74,6 @@ public class Main {
 
         if(serverConfig.node("open-to-lan").getBoolean()) OpenToLAN.open();
 
-        if(globalConfig.node("bungeecord", "enabled").getBoolean()) BungeeCordProxy.enable();
-
-        if(globalConfig.node("velocity", "enabled").getBoolean()) {
-            VelocityProxy.enable(Objects.requireNonNull(globalConfig.node("velocity", "secret").getString()));
-        }
-
         server.start("0.0.0.0", serverConfig.node("port").getInt(25565));
         System.gc();
 

src/main/java/eu/mhsl/minenet/minigames/Resource.java

@@ -21,6 +21,7 @@ public enum Resource {
 
     private final Path path;
     private final String name;
+
     Resource(String name, boolean keepOutdated) {
         this.name = name;
         this.path = Path.of("resources/" + name);
@@ -28,7 +29,7 @@ public enum Resource {
         try {
             Logger.getLogger("ressource").info("extracting resource " + name + " ... ");
             ResourceUtils.extractResource(name, keepOutdated);
-        } catch (URISyntaxException | IOException e) {
+        } catch(URISyntaxException | IOException e) {
             throw new RuntimeException(e);
         }
     }
@@ -38,10 +39,10 @@ public enum Resource {
     }
 
     public Path getPath() {
-        return path;
+        return this.path;
     }
 
     public String getName() {
-        return name;
+        return this.name;
     }
 }

src/main/java/eu/mhsl/minenet/minigames/api/Controller.java

@@ -12,11 +12,11 @@ public abstract class Controller<Q, R> implements Route {
 
     @SuppressWarnings("unchecked")
     public Controller() {
-        this.requestType = ((Class<Q>) ((ParameterizedType) getClass().getGenericSuperclass()).getActualTypeArguments()[0]);
+        this.requestType = ((Class<Q>) ((ParameterizedType) this.getClass().getGenericSuperclass()).getActualTypeArguments()[0]);
     }
 
     @Override
-    public Object handle(Request request, Response response) throws Exception {
+    public Object handle(Request request, Response response) {
         response.header("Access-Control-Allow-Origin", "*");
         response.header("Access-Control-Allow-Methods", "*");
 
@@ -28,7 +28,7 @@ public abstract class Controller<Q, R> implements Route {
             req = new Gson().fromJson(request.body(), this.requestType);
         }
 
-        return new Gson().toJson(handle(req, response));
+        return new Gson().toJson(this.handle(req, response));
     }
 
     public abstract R handle(Q request, Response response);

src/main/java/eu/mhsl/minenet/minigames/api/HttpServer.java

@@ -10,6 +10,7 @@ import static spark.Spark.*;
 
 public class HttpServer {
     private static final ConfigurationNode apiConfig = Main.globalConfig.node("api");
+
     public HttpServer() {
         if(!apiConfig.node("enabled").getBoolean()) return;
 

src/main/java/eu/mhsl/minenet/minigames/api/routes/closeRoom/CloseRoom.java

@@ -6,8 +6,12 @@ import spark.Response;
 
 import java.util.UUID;
 
-record Req(UUID room) {}
+record Req(UUID room) {
-record Resp() {}
+}
+
+record Resp() {
+}
+
 public class CloseRoom extends Controller<Req, Resp> {
     @Override
     public Resp handle(Req request, Response response) {

src/main/java/eu/mhsl/minenet/minigames/api/routes/createRoom/CreateRoom.java

@@ -6,8 +6,12 @@ import spark.Response;
 
 import java.util.UUID;
 
-record Req() {}
+record Req() {
-record Resp(UUID uuid) {}
+}
+
+record Resp(UUID uuid) {
+}
+
 public class CreateRoom extends Controller<Req, Resp> {
     @Override
     public Resp handle(Req request, Response response) {

src/main/java/eu/mhsl/minenet/minigames/api/routes/queueRoom/QueueRoom.java

@@ -8,8 +8,12 @@ import spark.Response;
 
 import java.util.UUID;
 
-record Req(UUID player, UUID room) {}
+record Req(UUID player, UUID room) {
-record Resp(String error) {}
+}
+
+record Resp(String error) {
+}
+
 public class QueueRoom extends Controller<Req, Resp> {
     @Override
     public Resp handle(Req request, Response response) {

src/main/java/eu/mhsl/minenet/minigames/command/Commands.java

@@ -1,9 +1,8 @@
 package eu.mhsl.minenet.minigames.command;
 
-import eu.mhsl.minenet.minigames.command.privileged.SkinCommand;
-import eu.mhsl.minenet.minigames.command.privileged.*;
 import eu.mhsl.minenet.minigames.command.anonymous.HubCommand;
 import eu.mhsl.minenet.minigames.command.anonymous.LeaveCommand;
+import eu.mhsl.minenet.minigames.command.privileged.*;
 import eu.mhsl.minenet.minigames.message.Icon;
 import eu.mhsl.minenet.minigames.message.type.ChatMessage;
 import net.minestom.server.MinecraftServer;
@@ -33,10 +32,6 @@ public enum Commands {
     PLAYERLIMIT(new PlayerLimitCommand()),
     SETMEMORIAL(new SetMemorialCommand());
 
-    Commands(Command handler) {
-        MinecraftServer.getCommandManager().register(handler);
-    }
-
     static {
         MinecraftServer.getCommandManager().setUnknownCommandCallback((sender, command) -> {
             if(command.isBlank()) return;
@@ -47,4 +42,8 @@ public enum Commands {
                 .send(sender);
         });
     }
+
+    Commands(Command handler) {
+        MinecraftServer.getCommandManager().register(handler);
+    }
 }

src/main/java/eu/mhsl/minenet/minigames/command/PrivilegedCommand.java

@@ -11,20 +11,21 @@ import java.util.List;
 
 public class PrivilegedCommand extends Command {
     private final List<CommandCondition> conditions = new ArrayList<>();
+
     public PrivilegedCommand(@NotNull String name, @Nullable String... aliases) {
         super(name, aliases);
-        construct();
+        this.construct();
     }
 
     public PrivilegedCommand(@NotNull String name) {
         super(name);
-        construct();
+        this.construct();
     }
 
     private void construct() {
-        addCondition(isPrivileged());
+        this.addCondition(this.isPrivileged());
 
-        setCondition((sender, commandString) -> conditions.parallelStream().allMatch(condition -> condition.canUse(sender, commandString)));
+        this.setCondition((sender, commandString) -> this.conditions.parallelStream().allMatch(condition -> condition.canUse(sender, commandString)));
     }
 
     protected CommandCondition isPrivileged() {
@@ -32,6 +33,6 @@ public class PrivilegedCommand extends Command {
     }
 
     protected void addCondition(CommandCondition condition) {
-        conditions.add(condition);
+        this.conditions.add(condition);
     }
 }

src/main/java/eu/mhsl/minenet/minigames/command/anonymous/HubCommand.java

@@ -1,8 +1,8 @@
 package eu.mhsl.minenet.minigames.command.anonymous;
 
-import eu.mhsl.minenet.minigames.util.MoveInstance;
 import eu.mhsl.minenet.minigames.instance.hub.Hub;
 import eu.mhsl.minenet.minigames.instance.room.Room;
+import eu.mhsl.minenet.minigames.util.MoveInstance;
 import net.minestom.server.command.builder.Command;
 import net.minestom.server.entity.Player;
 
@@ -10,12 +10,12 @@ public class HubCommand extends Command {
     public HubCommand() {
         super("hub");
 
-        setCondition(
+        this.setCondition(
             (sender, commandString) ->
                 ((Player) sender).getInstance() instanceof Room room && !room.apiDriven
         );
 
-        setDefaultExecutor((sender, context) -> {
+        this.setDefaultExecutor((sender, context) -> {
             if(Room.getRoom((Player) sender).orElseThrow().apiDriven) return;
             Room.unsetRoom((Player) sender);
             MoveInstance.move((Player) sender, Hub.INSTANCE);

src/main/java/eu/mhsl/minenet/minigames/command/anonymous/LeaveCommand.java

@@ -9,8 +9,8 @@ public class LeaveCommand extends Command {
     public LeaveCommand() {
         super("leave");
 
-        setCondition((sender, commandString) -> ((Player) sender).getInstance() instanceof Game);
+        this.setCondition((sender, commandString) -> ((Player) sender).getInstance() instanceof Game);
 
-        setDefaultExecutor((sender, context) -> Room.setOwnRoom((Player) sender));
+        this.setDefaultExecutor((sender, context) -> Room.setOwnRoom((Player) sender));
     }
 }

src/main/java/eu/mhsl/minenet/minigames/command/privileged/DebugCommand.java

@@ -14,26 +14,26 @@ public class DebugCommand extends PrivilegedCommand {
     public DebugCommand() {
         super("debug");
 
-        setDefaultExecutor((sender, args) -> {
+        this.setDefaultExecutor((sender, args) -> {
             new ChatMessage(Icon.CHAT).appendTranslated("sample").send(sender);
             new ActionBarMessage().appendTranslated("sample").send(sender);
             new TitleMessage().subtitle(subtitleMessage -> subtitleMessage.appendTranslated("sample")).appendTranslated("sample").send(sender);
             List<String> testplayers = new ArrayList<>() {
                 {
-                    add("MineTec");
+                    this.add("MineTec");
-                    add("Goldi187");
+                    this.add("Goldi187");
-                    add("Test");
+                    this.add("Test");
                 }
             };
             new ChatMessage(Icon.STAR, true)
-                    .appendTranslated("score#result")
+                .appendTranslated("score#result")
-                    .newLine()
+                .newLine()
-                    .indent()
+                .indent()
-                    .numberedList(testplayers)
+                .numberedList(testplayers)
-                    .undent()
+                .undent()
-                    .newLine()
+                .newLine()
-                    .appendTranslated("score#thanks")
+                .appendTranslated("score#thanks")
-                    .send(sender);
+                .send(sender);
 
             new ChatMessage(Icon.SCIENCE).appendStatic(((Player) sender).getUuid().toString()).send(sender);
         });

src/main/java/eu/mhsl/minenet/minigames/command/privileged/FlyCommand.java

@@ -8,7 +8,7 @@ public class FlyCommand extends PrivilegedCommand {
     public FlyCommand() {
         super("fly");
 
-        setDefaultExecutor((sender, context) -> {
+        this.setDefaultExecutor((sender, context) -> {
             Player p = (Player) sender;
             p.setVelocity(new Vec(0, 5, 0));
             p.setFlying(!p.isFlying());

src/main/java/eu/mhsl/minenet/minigames/command/privileged/GameStartCommand.java

@@ -7,11 +7,11 @@ import net.minestom.server.entity.Player;
 public class GameStartCommand extends PrivilegedCommand {
     public GameStartCommand() {
         super("gameStart");
-        setDefaultExecutor((sender, context) -> {
+        this.setDefaultExecutor((sender, context) -> {
             Player player = (Player) sender;
             if(player.getInstance() instanceof StatelessGame game) {
                 game.startAccessor();
             }
-         });
+        });
     }
 }

src/main/java/eu/mhsl/minenet/minigames/command/privileged/GameStopCommand.java

@@ -7,7 +7,7 @@ import net.minestom.server.entity.Player;
 public class GameStopCommand extends PrivilegedCommand {
     public GameStopCommand() {
         super("gameStop");
-        setDefaultExecutor((sender, context) -> {
+        this.setDefaultExecutor((sender, context) -> {
             Player player = (Player) sender;
             if(player.getInstance() instanceof StatelessGame game) {
                 game.stop();

src/main/java/eu/mhsl/minenet/minigames/command/privileged/GameTimeoutCommand.java

@@ -12,7 +12,7 @@ public class GameTimeoutCommand extends PrivilegedCommand {
 
         ArgumentInteger timeout = ArgumentType.Integer("timeout");
 
-        addSyntax((sender, context) -> {
+        this.addSyntax((sender, context) -> {
             Player player = (Player) sender;
             if(player.getInstance() instanceof StatelessGame game) {
                 game.setTimeLimit(context.get(timeout));

src/main/java/eu/mhsl/minenet/minigames/command/privileged/GamemodeCommand.java

@@ -11,9 +11,9 @@ public class GamemodeCommand extends PrivilegedCommand {
         super("gamemode", "gm");
 
 
-        addSyntax((sender, context) -> ((Player) sender).setGameMode(
+        this.addSyntax((sender, context) -> ((Player) sender).setGameMode(
                 context.get("target")),
-                ArgumentType.Enum("target", GameMode.class).setFormat(ArgumentEnum.Format.LOWER_CASED)
+            ArgumentType.Enum("target", GameMode.class).setFormat(ArgumentEnum.Format.LOWER_CASED)
         );
     }
 }

src/main/java/eu/mhsl/minenet/minigames/command/privileged/GcCommand.java

@@ -1,17 +1,18 @@
 package eu.mhsl.minenet.minigames.command.privileged;
 
 import eu.mhsl.minenet.minigames.command.PrivilegedCommand;
-import eu.mhsl.minenet.minigames.message.type.ChatMessage;
 import eu.mhsl.minenet.minigames.message.Icon;
+import eu.mhsl.minenet.minigames.message.type.ChatMessage;
 import eu.mhsl.minenet.minigames.util.Monitoring;
 
 public class GcCommand extends PrivilegedCommand {
     private static long lastRun = System.currentTimeMillis();
+
     public GcCommand() {
         super("gc");
 
-        setDefaultExecutor((sender, context) -> {
+        this.setDefaultExecutor((sender, context) -> {
-            long nextRun = (lastRun - (System.currentTimeMillis() - 30*1000)) / 1000;
+            long nextRun = (lastRun - (System.currentTimeMillis() - 30 * 1000)) / 1000;
             if(nextRun > 0) {
                 new ChatMessage(Icon.ERROR).appendStatic("Please wait ").appendStatic(String.valueOf(nextRun)).appendStatic(" seconds before running GC again!").send(sender);
                 return;
@@ -24,10 +25,10 @@ public class GcCommand extends PrivilegedCommand {
             long after = Monitoring.getRamUsage();
 
             new ChatMessage(Icon.SUCCESS).appendStatic("Garbage collector ran successfully!").newLine()
-                    .appendStatic("before: ").appendStatic(String.valueOf(before)).appendStatic("MB").newLine()
+                .appendStatic("before: ").appendStatic(String.valueOf(before)).appendStatic("MB").newLine()
-                    .appendStatic("now: ").appendStatic(String.valueOf(after)).appendStatic("MB").newLine()
+                .appendStatic("now: ").appendStatic(String.valueOf(after)).appendStatic("MB").newLine()
-                    .appendStatic("difference: ").appendStatic(String.valueOf(before-after)).appendStatic("MB")
+                .appendStatic("difference: ").appendStatic(String.valueOf(before - after)).appendStatic("MB")
-                    .send(sender);
+                .send(sender);
         });
     }
 }

src/main/java/eu/mhsl/minenet/minigames/command/privileged/InstanceProxyMoveCommand.java

@@ -13,7 +13,7 @@ public class InstanceProxyMoveCommand extends PrivilegedCommand {
 
         ArgumentWord serverArgument = new ArgumentWord("server");
 
-        addSyntax((sender, context) -> {
+        this.addSyntax((sender, context) -> {
             Instance room = ((Player) sender).getInstance();
             room.getPlayers().forEach(player -> {
                 Room.unsetRoom(player);

src/main/java/eu/mhsl/minenet/minigames/command/privileged/KickCommand.java

@@ -11,17 +11,17 @@ public class KickCommand extends PrivilegedCommand {
     public KickCommand() {
         super("kick");
 
-        addSyntax(
+        this.addSyntax(
             (sender, context) ->
-                kick(context.getRaw("player"), ""),
+                this.kick(context.getRaw("player"), ""),
-                ArgumentType.Entity("player").onlyPlayers(true)
+            ArgumentType.Entity("player").onlyPlayers(true)
         );
 
-        addSyntax(
+        this.addSyntax(
             (sender, context) ->
-                kick(context.getRaw("player"), context.getRaw("reason")),
+                this.kick(context.getRaw("player"), context.getRaw("reason")),
-                ArgumentType.Entity("player").onlyPlayers(true),
+            ArgumentType.Entity("player").onlyPlayers(true),
-                ArgumentType.String("reason")
+            ArgumentType.String("reason")
         );
     }
 

src/main/java/eu/mhsl/minenet/minigames/command/privileged/LangTestCommand.java

@@ -1,8 +1,8 @@
 package eu.mhsl.minenet.minigames.command.privileged;
 
 import eu.mhsl.minenet.minigames.command.PrivilegedCommand;
-import eu.mhsl.minenet.minigames.lang.Languages;
 import eu.mhsl.minenet.minigames.lang.Lang;
+import eu.mhsl.minenet.minigames.lang.Languages;
 import eu.mhsl.minenet.minigames.message.Icon;
 import eu.mhsl.minenet.minigames.message.TranslatableMessage;
 import eu.mhsl.minenet.minigames.message.type.ChatMessage;
@@ -13,11 +13,11 @@ public class LangTestCommand extends PrivilegedCommand {
     public LangTestCommand() {
         super("langtest");
 
-        setDefaultExecutor((sender, context) -> sendMessage(Languages.getInstance().getLanguage((Player) sender), "sample").send(sender));
+        this.setDefaultExecutor((sender, context) -> this.sendMessage(Languages.getInstance().getLanguage((Player) sender), "sample").send(sender));
 
         var targetString = ArgumentType.String("mapId");
 
-        addSyntax((sender, context) -> sendMessage(Languages.getInstance().getLanguage((Player) sender), context.get("mapId")).send(sender), targetString);
+        this.addSyntax((sender, context) -> this.sendMessage(Languages.getInstance().getLanguage((Player) sender), context.get("mapId")).send(sender), targetString);
     }
 
     private TranslatableMessage sendMessage(Lang lang, String mapId) {

src/main/java/eu/mhsl/minenet/minigames/command/privileged/OpCommand.java

@@ -11,7 +11,7 @@ public class OpCommand extends PrivilegedCommand {
     public OpCommand() {
         super("op");
 
-        addSyntax((sender, context) -> {
+        this.addSyntax((sender, context) -> {
             Player target = MinecraftServer.getConnectionManager().getOnlinePlayerByUsername(context.getRaw("target"));
             if(target != null) {
                 target.setPermissionLevel(4);

src/main/java/eu/mhsl/minenet/minigames/command/privileged/PlayerLimitCommand.java

@@ -10,8 +10,9 @@ public class PlayerLimitCommand extends PrivilegedCommand {
 
         ArgumentInteger count = ArgumentType.Integer("count");
 
-        addSyntax((sender, context) -> {
+        this.addSyntax((sender, context) -> System.setProperty(
-            System.setProperty("minenet.playerlimit", String.valueOf(context.get(count)));
+            "minenet.playerlimit",
-        }, count);
+            String.valueOf(context.get(count))
+        ), count);
     }
 }

src/main/java/eu/mhsl/minenet/minigames/command/privileged/PublishRewardCommand.java

@@ -13,10 +13,11 @@ import java.net.http.HttpResponse;
 
 public class PublishRewardCommand extends PrivilegedCommand {
     private final HttpClient rewardPublishClient = HttpClient.newHttpClient();
+
     public PublishRewardCommand() {
         super("publishReward");
 
-        setDefaultExecutor((sender, context) -> {
+        this.setDefaultExecutor((sender, context) -> {
             try {
                 Room room = Room.getRoom((Player) sender).orElseThrow();
                 TournamentDisplay world = new TournamentDisplay(room.getTournament());
@@ -24,14 +25,14 @@ public class PublishRewardCommand extends PrivilegedCommand {
 
                 String rewardRequestJson = new Gson().toJson(room.getTournament().getRewards());
                 HttpRequest giveRewardsRequest = HttpRequest.newBuilder()
-                        .uri(new URI("http://10.20.7.1:8080/api/event/reward"))
+                    .uri(new URI("http://10.20.9.3:8080/api/event/reward"))
-                        .POST(HttpRequest.BodyPublishers.ofString(rewardRequestJson))
+                    .POST(HttpRequest.BodyPublishers.ofString(rewardRequestJson))
-                        .build();
+                    .build();
 
                 room.getTournament().getRewards();
-                HttpResponse<Void> rawResponse = rewardPublishClient.send(giveRewardsRequest, HttpResponse.BodyHandlers.discarding());
+                HttpResponse<Void> rawResponse = this.rewardPublishClient.send(giveRewardsRequest, HttpResponse.BodyHandlers.discarding());
                 sender.sendMessage(String.format("Rewards published: HTTP %s", rawResponse.statusCode()));
-            } catch (Exception e) {
+            } catch(Exception e) {
                 sender.sendMessage(e.getMessage());
             }
         });

src/main/java/eu/mhsl/minenet/minigames/command/privileged/RefreshCommandsCommand.java

@@ -1,8 +1,8 @@
 package eu.mhsl.minenet.minigames.command.privileged;
 
 import eu.mhsl.minenet.minigames.command.PrivilegedCommand;
-import eu.mhsl.minenet.minigames.message.type.ChatMessage;
 import eu.mhsl.minenet.minigames.message.Icon;
+import eu.mhsl.minenet.minigames.message.type.ChatMessage;
 import net.minestom.server.MinecraftServer;
 import net.minestom.server.entity.Player;
 
@@ -10,7 +10,7 @@ public class RefreshCommandsCommand extends PrivilegedCommand {
     public RefreshCommandsCommand() {
         super("refreshCommands");
 
-        setDefaultExecutor((sender, context) -> {
+        this.setDefaultExecutor((sender, context) -> {
             MinecraftServer.getConnectionManager().getOnlinePlayers().forEach(Player::refreshCommands);
             new ChatMessage(Icon.SUCCESS).appendStatic("Updated command syntax!").send(sender);
         });

src/main/java/eu/mhsl/minenet/minigames/command/privileged/RoomCommand.java

@@ -1,10 +1,10 @@
 package eu.mhsl.minenet.minigames.command.privileged;
 
 import eu.mhsl.minenet.minigames.command.PrivilegedCommand;
+import eu.mhsl.minenet.minigames.instance.room.Room;
 import eu.mhsl.minenet.minigames.message.Icon;
 import eu.mhsl.minenet.minigames.message.TranslatableMessage;
 import eu.mhsl.minenet.minigames.message.type.ChatMessage;
-import eu.mhsl.minenet.minigames.instance.room.Room;
 import net.minestom.server.entity.Player;
 
 import java.util.stream.Collectors;
@@ -13,14 +13,14 @@ public class RoomCommand extends PrivilegedCommand {
     public RoomCommand() {
         super("room");
 
-        setDefaultExecutor((sender, context) -> {
+        this.setDefaultExecutor((sender, context) -> {
             TranslatableMessage out = new ChatMessage(Icon.SCIENCE).appendStatic("Rooms:").newLine();
 
             Room.getAllRooms().forEach((roomInstance) -> out
-                    .newLine()
+                .newLine()
-                    .appendStatic("Owner: ").appendStatic(roomInstance.getOwner() != null ? roomInstance.getOwner().getUsername() : "none").newLine()
+                .appendStatic("Owner: ").appendStatic(roomInstance.getOwner() != null ? roomInstance.getOwner().getUsername() : "none").newLine()
-                    .appendStatic("Players: ").appendStatic(String.valueOf(roomInstance.getAllMembers().size())).newLine()
+                .appendStatic("Players: ").appendStatic(String.valueOf(roomInstance.getAllMembers().size())).newLine()
-                    .list(roomInstance.getAllMembers().stream().map(Player::getUsername).collect(Collectors.toList())).newLine());
+                .list(roomInstance.getAllMembers().stream().map(Player::getUsername).collect(Collectors.toList())).newLine());
 
             out.send(sender);
         });

src/main/java/eu/mhsl/minenet/minigames/command/privileged/SetMemorialCommand.java

@@ -20,37 +20,37 @@ public class SetMemorialCommand extends PrivilegedCommand {
         ArgumentString titleArgument = ArgumentType.String("title");
         ArgumentString loreArgument = ArgumentType.String("lore");
 
-        materialArgument.setSuggestionCallback((sender, context, suggestion) -> {
+        materialArgument.setSuggestionCallback(
-            Material
+            (sender, context, suggestion) -> Material
-                    .values()
+                .values()
-                    .stream()
+                .stream()
-                    .map(material -> new SuggestionEntry(material.name(), Component.text(material.name())))
+                .map(material -> new SuggestionEntry(material.name(), Component.text(material.name())))
-                    .forEach(suggestion::addEntry);
+                .forEach(suggestion::addEntry)
-        });
+        );
 
-        addSyntax((sender, context) -> {
+        this.addSyntax((sender, context) -> {
             Room
-                    .getRoom((Player) sender)
+                .getRoom((Player) sender)
-                    .orElseThrow()
+                .orElseThrow()
-                    .getTournament()
+                .getTournament()
-                    .setMemorialConfiguration(
+                .setMemorialConfiguration(
-                            new MemorialConfiguration(
+                    new MemorialConfiguration(
-                                    Material.fromNamespaceId(context.get(materialArgument)),
+                        Material.fromKey(context.get(materialArgument)),
-                                    context.get(titleArgument),
+                        context.get(titleArgument),
-                                    context.get(loreArgument)
+                        context.get(loreArgument)
-                            )
+                    )
-                    );
+                );
 
             sender.sendMessage(
-                    Component.text()
+                Component.text()
-                            .append(Component.text("Memorial gesetzt:", NamedTextColor.GOLD))
+                    .append(Component.text("Memorial gesetzt:", NamedTextColor.GOLD))
-                            .appendNewline()
+                    .appendNewline()
-                            .append(Component.text(context.get(materialArgument), NamedTextColor.AQUA))
+                    .append(Component.text(context.get(materialArgument), NamedTextColor.AQUA))
-                            .appendNewline()
+                    .appendNewline()
-                            .append(Component.text(context.get(titleArgument), NamedTextColor.RED))
+                    .append(Component.text(context.get(titleArgument), NamedTextColor.RED))
-                            .appendNewline()
+                    .appendNewline()
-                            .append(Component.text(context.get(loreArgument), NamedTextColor.DARK_RED))
+                    .append(Component.text(context.get(loreArgument), NamedTextColor.DARK_RED))
-                            .build()
+                    .build()
             );
         }, materialArgument, titleArgument, loreArgument);
     }

src/main/java/eu/mhsl/minenet/minigames/command/privileged/SetRewardCommand.java

@@ -22,34 +22,34 @@ public class SetRewardCommand extends PrivilegedCommand {
         ArgumentWord materialArgument = ArgumentType.Word("material");
         ArgumentStringArray amountsArgument = ArgumentType.StringArray("amount");
 
-        materialArgument.setSuggestionCallback((sender, context, suggestion) -> {
+        materialArgument.setSuggestionCallback(
-            Material
+            (sender, context, suggestion) -> Material
-                    .values()
+                .values()
-                    .stream()
+                .stream()
-                    .map(material -> new SuggestionEntry(material.name(), Component.text(material.name())))
+                .map(material -> new SuggestionEntry(material.name(), Component.text(material.name())))
-                    .forEach(suggestion::addEntry);
+                .forEach(suggestion::addEntry)
-        });
+        );
 
-        addSyntax((sender, context) -> {
+        this.addSyntax((sender, context) -> {
             Room
-                    .getRoom((Player) sender)
+                .getRoom((Player) sender)
-                    .orElseThrow()
+                .orElseThrow()
-                    .getTournament()
+                .getTournament()
-                    .setRewardConfiguration(
+                .setRewardConfiguration(
-                            new RewardConfiguration(
+                    new RewardConfiguration(
-                                    Material.fromNamespaceId(context.get(materialArgument)),
+                        Material.fromKey(context.get(materialArgument)),
-                                    Arrays.stream(context.get(amountsArgument)).map(Integer::valueOf).collect(Collectors.toList())
+                        Arrays.stream(context.get(amountsArgument)).map(Integer::valueOf).collect(Collectors.toList())
-                            )
+                    )
-                    );
+                );
 
             sender.sendMessage(
-                    Component.text()
+                Component.text()
-                            .append(Component.text("Belohnung gesetzt:", NamedTextColor.GOLD))
+                    .append(Component.text("Belohnung gesetzt:", NamedTextColor.GOLD))
-                            .appendNewline()
+                    .appendNewline()
-                            .append(Component.text(context.get(materialArgument), NamedTextColor.AQUA))
+                    .append(Component.text(context.get(materialArgument), NamedTextColor.AQUA))
-                            .appendNewline()
+                    .appendNewline()
-                            .append(Component.text(String.join(", ", context.get(amountsArgument)), NamedTextColor.RED))
+                    .append(Component.text(String.join(", ", context.get(amountsArgument)), NamedTextColor.RED))
-                            .build()
+                    .build()
             );
         }, materialArgument, amountsArgument);
     }

src/main/java/eu/mhsl/minenet/minigames/command/privileged/SetRoomOwnerCommand.java

@@ -15,16 +15,16 @@ public class SetRoomOwnerCommand extends PrivilegedCommand {
     public SetRoomOwnerCommand() {
         super("setRoomOwner");
 
-        addCondition((sender, commandString) -> ((Player) sender).getInstance() instanceof Room);
+        this.addCondition((sender, commandString) -> ((Player) sender).getInstance() instanceof Room);
 
-        setDefaultExecutor((sender, context) -> {
+        this.setDefaultExecutor((sender, context) -> {
             if(sender instanceof Player p) {
                 Room.getRoom(p).orElseThrow().setOwner(p);
                 new ChatMessage(Icon.SUCCESS).appendTranslated("room#ownerSelf").send(sender);
             }
         });
 
-        addSyntax((sender, context) -> {
+        this.addSyntax((sender, context) -> {
             System.out.println("Test");
             if(sender instanceof Player p) {
                 Player newOwner = MinecraftServer.getConnectionManager().getOnlinePlayerByUsername(context.getRaw("player"));

src/main/java/eu/mhsl/minenet/minigames/command/privileged/SkinCommand.java

@@ -9,7 +9,7 @@ public class SkinCommand extends PrivilegedCommand {
     public SkinCommand() {
         super("skin");
 
-        addSyntax((sender, context) -> {
+        this.addSyntax((sender, context) -> {
             if(sender instanceof Player p) {
                 p.setSkin(PlayerSkin.fromUsername(context.getRaw("target")));
             }

src/main/java/eu/mhsl/minenet/minigames/handler/Listeners.java

@@ -1,6 +1,10 @@
 package eu.mhsl.minenet.minigames.handler;
 
-import eu.mhsl.minenet.minigames.handler.global.*;
+import eu.mhsl.minenet.minigames.handler.global.AddEntityToInstanceEventListener;
+import eu.mhsl.minenet.minigames.handler.global.ChatFormatHandler;
+import eu.mhsl.minenet.minigames.handler.global.PlayerFreezeHandler;
+import eu.mhsl.minenet.minigames.handler.global.PlayerLeaveHandler;
+import eu.mhsl.minenet.minigames.handler.global.PlayerLoginHandler;
 import net.minestom.server.MinecraftServer;
 import net.minestom.server.event.EventListener;
 
@@ -8,6 +12,7 @@ public enum Listeners {
     SPAWN(new AddEntityToInstanceEventListener()),
     LOGIN(new PlayerLoginHandler()),
     LEAVE(new PlayerLeaveHandler()),
+    FREEZE(new PlayerFreezeHandler()),
     CHAT(new ChatFormatHandler());
 
     Listeners(EventListener<?> event) {

src/main/java/eu/mhsl/minenet/minigames/handler/global/ChatFormatHandler.java

@@ -2,6 +2,8 @@ package eu.mhsl.minenet.minigames.handler.global;
 
 import eu.mhsl.minenet.minigames.message.Icon;
 import eu.mhsl.minenet.minigames.message.type.ChatMessage;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.format.NamedTextColor;
 import net.minestom.server.event.EventListener;
 import net.minestom.server.event.player.PlayerChatEvent;
 import org.jetbrains.annotations.NotNull;
@@ -14,7 +16,14 @@ public class ChatFormatHandler implements EventListener<PlayerChatEvent> {
 
     @Override
     public @NotNull Result run(@NotNull PlayerChatEvent event) {
-        event.setFormattedMessage(new ChatMessage(Icon.CHAT).appendStatic(event.getRawMessage()).build(event.getPlayer()));
+        NamedTextColor color = event.getPlayer().getPermissionLevel() > 0 ? NamedTextColor.AQUA : NamedTextColor.GRAY;
+        event.setFormattedMessage(
+            new ChatMessage(Icon.CHAT)
+                .appendStatic(Component.text(event.getPlayer().getUsername(), color))
+                .appendStatic(Component.text(" > ", NamedTextColor.DARK_GRAY))
+                .appendStatic(event.getRawMessage())
+                .build(event.getPlayer())
+        );
         return Result.SUCCESS;
     }
 }

src/main/java/eu/mhsl/minenet/minigames/handler/global/PlayerFreezeHandler.java

@@ -0,0 +1,43 @@
+package eu.mhsl.minenet.minigames.handler.global;
+
+import net.minestom.server.coordinate.Pos;
+import net.minestom.server.entity.Player;
+import net.minestom.server.event.EventListener;
+import net.minestom.server.event.player.PlayerTickEvent;
+import net.minestom.server.instance.Instance;
+import net.minestom.server.instance.block.Block;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Weder Minestom noch MinestomPvP verwalten die TICKS_FROZEN-Metadata. Der 26.x-Client baut das
+ * Freeze-Overlay bei Powder-Snow-Kontakt zwar selbst auf, der Abbau ist aber server-authoritative —
+ * ohne diese Vanilla-Logik bleibt das Overlay dauerhaft haengen (auch ueber Instanzwechsel hinweg).
+ */
+public class PlayerFreezeHandler implements EventListener<PlayerTickEvent> {
+    private static final int TICKS_REQUIRED_TO_FREEZE = 140;
+
+    @Override
+    public @NotNull Class<PlayerTickEvent> eventType() {
+        return PlayerTickEvent.class;
+    }
+
+    @Override
+    public @NotNull Result run(@NotNull PlayerTickEvent event) {
+        Player p = event.getPlayer();
+        Instance instance = p.getInstance();
+        if(instance == null) return Result.SUCCESS;
+
+        Pos pos = p.getPosition();
+        boolean inPowderSnow = instance.getBlock(pos).compare(Block.POWDER_SNOW)
+            || instance.getBlock(pos.add(0, 1, 0)).compare(Block.POWDER_SNOW);
+
+        int ticksFrozen = p.getEntityMeta().getTickFrozen();
+        if(inPowderSnow) {
+            p.getEntityMeta().setTickFrozen(Math.min(TICKS_REQUIRED_TO_FREEZE, ticksFrozen + 1));
+        } else if(ticksFrozen > 0) {
+            p.getEntityMeta().setTickFrozen(Math.max(0, ticksFrozen - 2));
+        }
+
+        return Result.SUCCESS;
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/handler/global/PlayerLoginHandler.java

@@ -2,13 +2,13 @@ package eu.mhsl.minenet.minigames.handler.global;
 
 import eu.mhsl.minenet.minigames.Main;
 import eu.mhsl.minenet.minigames.api.QueuedPlayerRooms;
+import eu.mhsl.minenet.minigames.instance.hub.Hub;
 import eu.mhsl.minenet.minigames.instance.room.Room;
 import eu.mhsl.minenet.minigames.instance.transfer.Transfer;
 import eu.mhsl.minenet.minigames.skin.SkinCache;
 import eu.mhsl.minenet.minigames.util.MoveInstance;
 import net.minestom.server.MinecraftServer;
 import net.minestom.server.entity.Player;
-import eu.mhsl.minenet.minigames.instance.hub.Hub;
 import net.minestom.server.event.EventListener;
 import net.minestom.server.event.player.AsyncPlayerConfigurationEvent;
 import net.minestom.server.network.packet.server.play.TeamsPacket;
@@ -61,7 +61,8 @@ public class PlayerLoginHandler implements EventListener<AsyncPlayerConfiguratio
             if(Objects.requireNonNull(Main.globalConfig.node("admins").getList(String.class)).stream().anyMatch(s -> s.equalsIgnoreCase(p.getUsername()))) {
                 p.setPermissionLevel(4);
             }
-        } catch (SerializationException | NullPointerException ignored) {}
+        } catch(SerializationException | NullPointerException ignored) {
+        }
 
         Logger.getLogger("user").info(p.getUsername() + " joined");
 

src/main/java/eu/mhsl/minenet/minigames/instance/Dimension.java

@@ -1,48 +1,85 @@
 package eu.mhsl.minenet.minigames.instance;
 
+import net.kyori.adventure.key.Key;
 import net.minestom.server.MinecraftServer;
-import net.minestom.server.registry.DynamicRegistry;
+import net.minestom.server.registry.RegistryKey;
-import net.minestom.server.utils.NamespaceID;
+import net.minestom.server.registry.RegistryTag;
+import net.kyori.adventure.text.format.NamedTextColor;
+import net.kyori.adventure.text.format.TextColor;
 import net.minestom.server.world.DimensionType;
+import net.minestom.server.world.attribute.EnvironmentAttribute;
+import net.minestom.server.world.clock.WorldClock;
+import net.minestom.server.world.timeline.Timeline;
 
 /**
  * Prebuilt dimensions
  */
 public enum Dimension {
     OVERWORLD(
-            NamespaceID.from("minenet:fullbright_overworld"),
+        Key.key("minenet:fullbright_overworld"),
-            DimensionType
+        DimensionType
-                    .builder()
+            .builder()
-                    .ambientLight(2.0f)
+            // Fullbright: seit MC 26.1 laeuft die Grundhelligkeit ueber das Environment-Attribut
-                    .build()
+            // AMBIENT_LIGHT_COLOR (Vanilla-Overworld: #0A0A0A); der alte ambientLight-2.0-Hack
+            // liegt ausserhalb der validen Range und bricht das Client-Rendering
+            .setAttribute(EnvironmentAttribute.AMBIENT_LIGHT_COLOR, NamedTextColor.WHITE)
+            // defaultClock noetig, damit Instance#setTime/#defaultClock funktionieren (sonst null); Timelines wie Vanilla-Overworld
+            .defaultClock(WorldClock.OVERWORLD)
+            .timelines(RegistryTag.direct(Timeline.DAY, Timeline.MOON, Timeline.EARLY_GAME, Timeline.VILLAGER_SCHEDULE))
+            .build()
     ),
 
     NETHER(
-            NamespaceID.from("minenet:fullbright_nether"),
+        Key.key("minenet:fullbright_nether"),
-            DimensionType
+        DimensionType
-                    .builder()
+            .builder()
-                    .ambientLight(2.0f)
+            // Fullbright: seit MC 26.1 laeuft die Grundhelligkeit ueber das Environment-Attribut
-                    .effects("minecraft:the_nether")
+            // AMBIENT_LIGHT_COLOR (Vanilla-Overworld: #0A0A0A); der alte ambientLight-2.0-Hack
-                    .build()
+            // liegt ausserhalb der validen Range und bricht das Client-Rendering
+            .setAttribute(EnvironmentAttribute.AMBIENT_LIGHT_COLOR, NamedTextColor.WHITE)
+            .skybox(DimensionType.Skybox.NONE)
+            .defaultClock(WorldClock.OVERWORLD)
+            .timelines(RegistryTag.direct(Timeline.VILLAGER_SCHEDULE))
+            .build()
     ),
 
     THE_END(
-            NamespaceID.from("minenet:fullbright_end"),
+        Key.key("minenet:fullbright_end"),
-            DimensionType
+        DimensionType
-                    .builder()
+            .builder()
-                    .ambientLight(2.0f)
+            // Fullbright: seit MC 26.1 laeuft die Grundhelligkeit ueber das Environment-Attribut
-                    .effects("minecraft:the_end")
+            // AMBIENT_LIGHT_COLOR (Vanilla-Overworld: #0A0A0A); der alte ambientLight-2.0-Hack
-                    .build()
+            // liegt ausserhalb der validen Range und bricht das Client-Rendering
+            .setAttribute(EnvironmentAttribute.AMBIENT_LIGHT_COLOR, NamedTextColor.WHITE)
+            .skybox(DimensionType.Skybox.END)
+            .defaultClock(WorldClock.THE_END)
+            .timelines(RegistryTag.direct(Timeline.VILLAGER_SCHEDULE))
+            .build()
+    ),
+
+    BACKROOMS(
+        Key.key("minenet:backrooms"),
+        DimensionType
+            .builder()
+            // Sehr dunkles Grundlicht (knapp ueber Vanilla-Overworld #0A0A0A): die eigentliche
+            // Helligkeit kommt aus echten Lichtquellen via LightingChunk — Blackout-Biome
+            // sind dadurch tatsaechlich dunkel, mit weichen Uebergaengen am Zonenrand
+            .setAttribute(EnvironmentAttribute.AMBIENT_LIGHT_COLOR, TextColor.color(0x16160F))
+            .skybox(DimensionType.Skybox.NONE)
+            .defaultClock(WorldClock.OVERWORLD)
+            .timelines(RegistryTag.direct(Timeline.VILLAGER_SCHEDULE))
+            .build()
     );
 
     public final DimensionType DIMENSION;
-    public final NamespaceID namespaceID;
+    public final Key namespaceID;
-    public final DynamicRegistry.Key<DimensionType> key;
+    public final RegistryKey<DimensionType> key;
-    Dimension(NamespaceID namespaceID, DimensionType dimType) {
+
+    Dimension(Key namespaceID, DimensionType dimType) {
         this.DIMENSION = dimType;
         this.namespaceID = namespaceID;
 
-        this.key = MinecraftServer.getDimensionTypeRegistry().register(namespaceID, DIMENSION);
+        this.key = MinecraftServer.getDimensionTypeRegistry().register(namespaceID, this.DIMENSION);
     }
 
 }

src/main/java/eu/mhsl/minenet/minigames/instance/MineNetInstance.java

@@ -1,27 +1,34 @@
 package eu.mhsl.minenet.minigames.instance;
 
 import eu.mhsl.minenet.minigames.message.component.TranslatedComponent;
+import net.kyori.adventure.key.Key;
 import net.minestom.server.MinecraftServer;
 import net.minestom.server.entity.Player;
 import net.minestom.server.event.instance.AddEntityToInstanceEvent;
 import net.minestom.server.event.instance.RemoveEntityFromInstanceEvent;
 import net.minestom.server.instance.Instance;
 import net.minestom.server.instance.InstanceContainer;
-import net.minestom.server.instance.InstanceManager;
+import net.minestom.server.registry.RegistryKey;
-import net.minestom.server.registry.DynamicRegistry;
 import net.minestom.server.timer.TaskSchedule;
 import net.minestom.server.world.DimensionType;
 
 import java.util.UUID;
 
 public class MineNetInstance extends InstanceContainer {
-    public MineNetInstance(DynamicRegistry.Key<DimensionType> type) {
+    public MineNetInstance(RegistryKey<DimensionType> type) {
-        super(UUID.randomUUID(), type);
+        this(UUID.randomUUID(), type);
+    }
+
+    // Eindeutiger Dimension-Name pro Instanz: Minestom entscheidet anhand dieses Namens (nicht des
+    // DimensionTypes), ob beim setInstance das volle Respawn-Protokoll gefahren wird. Ohne den Reset
+    // rendert der 26.x-Client nach einem Wechsel zwischen Instanzen gleicher Dimension keine Chunks.
+    private MineNetInstance(UUID uuid, RegistryKey<DimensionType> type) {
+        super(uuid, type, Key.key("minenet", "instance-" + uuid));
         MinecraftServer.getInstanceManager().registerInstance(this);
 
-        eventNode()
+        this.eventNode()
-                .addListener(AddEntityToInstanceEvent.class, this::onEntityAdd)
+            .addListener(AddEntityToInstanceEvent.class, this::onEntityAdd)
-                .addListener(RemoveEntityFromInstanceEvent.class, this::onEntityRemove);
+            .addListener(RemoveEntityFromInstanceEvent.class, this::onEntityRemove);
     }
 
     private void onEntityRemove(RemoveEntityFromInstanceEvent removeEntityFromInstanceEvent) {
@@ -38,6 +45,7 @@ public class MineNetInstance extends InstanceContainer {
 
     /**
      * Called when Player joins this instance
+     *
      * @param p player who is joining
      * @return setCanceled
      */
@@ -47,18 +55,15 @@ public class MineNetInstance extends InstanceContainer {
 
     /**
      * Called when Player leaves this instance
+     *
      * @param p player who is leaving
      */
     protected void onPlayerLeave(Player p) {
 
     }
 
-    /**
-     *
-     * @param target
-     */
     public void destroy(Instance target) {
-        getPlayers().forEach(player -> {
+        this.getPlayers().forEach(player -> {
             if(target != null)
                 player.setInstance(target);
             else
@@ -66,9 +71,9 @@ public class MineNetInstance extends InstanceContainer {
         });
 
         MinecraftServer.getSchedulerManager().scheduleTask(
-                () -> MinecraftServer.getInstanceManager().unregisterInstance(this),
+            () -> MinecraftServer.getInstanceManager().unregisterInstance(this),
-                TaskSchedule.seconds(10),
+            TaskSchedule.seconds(10),
-                TaskSchedule.stop()
+            TaskSchedule.stop()
         );
     }
 }

src/main/java/eu/mhsl/minenet/minigames/instance/game/Game.java

@@ -1,14 +1,14 @@
 package eu.mhsl.minenet.minigames.instance.game;
 
 import eu.mhsl.minenet.minigames.instance.MineNetInstance;
+import eu.mhsl.minenet.minigames.instance.Spawnable;
 import eu.mhsl.minenet.minigames.instance.game.stateless.config.GameFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.config.Option;
+import eu.mhsl.minenet.minigames.instance.room.Room;
 import eu.mhsl.minenet.minigames.message.Icon;
 import eu.mhsl.minenet.minigames.message.type.ChatMessage;
 import eu.mhsl.minenet.minigames.score.Score;
 import eu.mhsl.minenet.minigames.util.CommonEventHandles;
-import eu.mhsl.minenet.minigames.instance.Spawnable;
-import eu.mhsl.minenet.minigames.instance.room.Room;
 import net.minestom.server.MinecraftServer;
 import net.minestom.server.coordinate.Pos;
 import net.minestom.server.entity.Player;
@@ -16,7 +16,7 @@ import net.minestom.server.event.item.ItemDropEvent;
 import net.minestom.server.event.player.PlayerBlockBreakEvent;
 import net.minestom.server.event.player.PlayerBlockPlaceEvent;
 import net.minestom.server.event.player.PlayerMoveEvent;
-import net.minestom.server.registry.DynamicRegistry;
+import net.minestom.server.registry.RegistryKey;
 import net.minestom.server.timer.ExecutionType;
 import net.minestom.server.timer.TaskSchedule;
 import net.minestom.server.world.DimensionType;
@@ -28,34 +28,26 @@ import java.util.concurrent.CompletableFuture;
 import java.util.logging.Logger;
 
 public abstract class Game extends MineNetInstance implements Spawnable {
-
+    protected final Random rnd = new Random();
+    protected final Logger logger;
     protected Room parentRoom;
     protected boolean isRunning = false;
     protected boolean isBeforeBeginning = true;
 
-    protected final Random rnd = new Random(); //TODO better way than ths?
+    public Game(RegistryKey<DimensionType> dimensionType) {
-
-    protected final Logger logger;
-
-    public Game(DynamicRegistry.Key<DimensionType> dimensionType) {
         super(dimensionType);
 
         MinecraftServer.getInstanceManager().registerInstance(this);
 
-        logger = Logger.getLogger("Game:" + getUuid());
+        this.logger = Logger.getLogger("Game:" + this.getUuid());
 
-        eventNode()
+        this.eventNode()
             .addListener(PlayerMoveEvent.class, this::onPlayerMove)
             .addListener(PlayerBlockBreakEvent.class, this::onBlockBreak)
             .addListener(PlayerBlockPlaceEvent.class, this::onBlockPlace)
             .addListener(ItemDropEvent.class, this::onItemDrop);
     }
 
-    public Game setParent(Room parentRoom) {
-        this.parentRoom = parentRoom;
-        return this;
-    }
-
     public static void initialize(GameFactory factory, List<Option<?>> options, Player owner) {
         try {
             Room originRoom = Room.getRoom(owner).orElseThrow();
@@ -69,18 +61,23 @@ public abstract class Game extends MineNetInstance implements Spawnable {
                 .appendTranslated(factory.description())
                 .send(originRoom.getAllMembers());
 
-        } catch (Exception e) {
+        } catch(Exception e) {
             new ChatMessage(Icon.ERROR).appendStatic("Instance crashed: " + e.getMessage()).send(owner);
             MinecraftServer.getSchedulerManager().scheduleNextTick(() -> Room.getRoom(owner).orElseThrow().moveMembersToRoomLobby());
             e.printStackTrace(System.err);
         }
     }
 
+    public Game setParent(Room parentRoom) {
+        this.parentRoom = parentRoom;
+        return this;
+    }
+
     /**
      * Load and start countdown
      */
     public void load() {
-        scheduler().submitTask(() -> {
+        this.scheduler().submitTask(() -> {
             CompletableFuture<Void> callback = new CompletableFuture<>();
             this.onLoad(callback);
 //            callback.whenComplete((unused, throwable) -> this.start());
@@ -90,13 +87,13 @@ public abstract class Game extends MineNetInstance implements Spawnable {
     }
 
     protected void start() {
-        isRunning = true;
+        this.isRunning = true;
-        isBeforeBeginning = false;
+        this.isBeforeBeginning = false;
         this.onStart();
     }
 
     public void stop() {
-        isRunning = false;
+        this.isRunning = false;
         this.onStop();
         this.unload();
     }
@@ -104,12 +101,12 @@ public abstract class Game extends MineNetInstance implements Spawnable {
     public void unload() {
         this.onUnload();
 
-        getPlayers().forEach(Room::setOwnRoom);
+        this.getPlayers().forEach(Room::setOwnRoom);
 
-        scheduler().scheduleTask(() -> {
+        this.scheduler().scheduleTask(() -> {
 
-            logger.info("stopping game instance " + this.uuid);
+            this.logger.info("stopping game instance " + this.uuid);
-            getPlayers().forEach(player -> player.kick("timeout"));
+            this.getPlayers().forEach(player -> player.kick("timeout"));
 
             MinecraftServer.getInstanceManager().unregisterInstance(this);
 
@@ -120,9 +117,14 @@ public abstract class Game extends MineNetInstance implements Spawnable {
         callback.complete(null);
     }
 
-    protected void onStart() {}
+    protected void onStart() {
-    protected void onStop() {}
+    }
-    protected void onUnload() {}
+
+    protected void onStop() {
+    }
+
+    protected void onUnload() {
+    }
 
     protected void onPlayerMove(@NotNull PlayerMoveEvent playerMoveEvent) {
 
@@ -146,7 +148,7 @@ public abstract class Game extends MineNetInstance implements Spawnable {
     }
 
     protected void checkAbandoned() {
-        scheduleNextTick((instance) -> {
+        this.scheduleNextTick((instance) -> {
             if(instance.getPlayers().isEmpty()) this.unload();
         });
     }
@@ -156,10 +158,10 @@ public abstract class Game extends MineNetInstance implements Spawnable {
     }
 
     public boolean isRunning() {
-        return isRunning;
+        return this.isRunning;
     }
 
     public Pos getSpawn() {
-        return new Pos(0,50,0);
+        return new Pos(0, 50, 0);
     }
 }

src/main/java/eu/mhsl/minenet/minigames/instance/game/GameList.java

@@ -1,23 +1,28 @@
 package eu.mhsl.minenet.minigames.instance.game;
 
 import eu.mhsl.minenet.minigames.instance.game.stateless.config.GameFactory;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.acidRain.AcidRainFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.anvilRun.AnvilRunFactory;
-import eu.mhsl.minenet.minigames.instance.game.stateless.types.blockBreakRace.BlockBreakRaceFactory;
-import eu.mhsl.minenet.minigames.instance.game.stateless.types.bowSpleef.BowSpleefFactory;
-import eu.mhsl.minenet.minigames.instance.game.stateless.types.elytraRace.ElytraRaceFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.bedwars.BedwarsFactory;
-import eu.mhsl.minenet.minigames.instance.game.stateless.types.acidRain.AcidRainFactory;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.blockBattle.BlockBattleFactory;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.blockBreakRace.BlockBreakRaceFactory;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.boatRace.BoatRaceFactory;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.bowSpleef.BowSpleefFactory;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.colorJump.ColorJumpFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.deathcube.DeathcubeFactory;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.elytraRace.ElytraRaceFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.fastbridge.FastbridgeFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.highGround.HighGroundFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.jumpDive.JumpDiveFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.minerun.MinerunFactory;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.pillars.PillarsFactory;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.playerRace.PlayerRaceFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.spaceSnake.SpaceSnakeFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.spleef.SpleefFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.stickfight.StickFightFactory;
-import eu.mhsl.minenet.minigames.instance.game.stateless.types.tetris.TetrisFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.sumo.SumoFactory;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.tetris.TetrisFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.tntrun.TntRunFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.towerdefense.TowerdefenseFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.types.trafficlightrace.TrafficLightRaceFactory;
@@ -30,7 +35,7 @@ public enum GameList {
     STICKFIGHT(new StickFightFactory(), GameType.PROTOTYPE),
     TOWERDEFENSE(new TowerdefenseFactory(), GameType.PROTOTYPE),
     BEDWARS(new BedwarsFactory(), GameType.PROTOTYPE),
-    BACKROOMS(new BackroomsFactory(), GameType.PROTOTYPE),
+    BACKROOMS(new BackroomsFactory(), GameType.PVE),
     BOWSPLEEF(new BowSpleefFactory(), GameType.PROTOTYPE),
     TETRIS(new TetrisFactory(), GameType.OTHER),
     TNTRUN(new TntRunFactory(), GameType.OTHER),
@@ -44,14 +49,21 @@ public enum GameList {
     HIGHGROUND(new HighGroundFactory(), GameType.PVP),
     FASTBRIDGE(new FastbridgeFactory(), GameType.OTHER),
     BLOCKBREAKRACE(new BlockBreakRaceFactory(), GameType.OTHER),
-    SPACESNAKE(new SpaceSnakeFactory(), GameType.PVP);
+    SPACESNAKE(new SpaceSnakeFactory(), GameType.PVP),
+    BOATRACE(new BoatRaceFactory(), GameType.OTHER),
+    PILLARS(new PillarsFactory(), GameType.PROTOTYPE),
+    BLOCKBATTLE(new BlockBattleFactory(), GameType.PVP),
+    COLORJUMP(new ColorJumpFactory(), GameType.JUMPNRUN),
+    PLAYERRACE(new PlayerRaceFactory(), GameType.JUMPNRUN);
 
     private final GameFactory factory;
     private final GameType type;
+
     GameList(GameFactory factory, GameType type) {
         this.factory = factory;
         this.type = type;
     }
+
     public GameFactory getFactory() {
         return this.factory;
     }

src/main/java/eu/mhsl/minenet/minigames/instance/game/GameType.java

@@ -22,15 +22,15 @@ public enum GameType {
     }
 
     public Material getIcon() {
-        return icon;
+        return this.icon;
     }
 
     public TranslatedComponent getTitle() {
-        return title;
+        return this.title;
     }
 
     public TranslatedComponent getDescription() {
-        return description;
+        return this.description;
     }
 
 

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/StatelessGame.java

@@ -9,7 +9,7 @@ import eu.mhsl.minenet.minigames.score.Score;
 import net.kyori.adventure.audience.Audience;
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.format.NamedTextColor;
-import net.minestom.server.registry.DynamicRegistry;
+import net.minestom.server.registry.RegistryKey;
 import net.minestom.server.timer.ExecutionType;
 import net.minestom.server.timer.Task;
 import net.minestom.server.timer.TaskSchedule;
@@ -26,7 +26,7 @@ public class StatelessGame extends Game {
     private int timeLimit = 0;
     private int timePlayed = 0;
 
-    public StatelessGame(DynamicRegistry.Key<DimensionType> dimensionType, String gameName, Score score) {
+    public StatelessGame(RegistryKey<DimensionType> dimensionType, String gameName, Score score) {
         super(dimensionType);
         this.score = score;
         this.name = gameName;
@@ -37,7 +37,7 @@ public class StatelessGame extends Game {
     }
 
     public String getName() {
-        return name;
+        return this.name;
     }
 
     public void setTimeLimit(int limit) {
@@ -47,24 +47,23 @@ public class StatelessGame extends Game {
             this.timePlayed = 0;
         }
         if(this.timeLimit > 0) {
-            this.timeLimitTask = scheduler().submitTask(() -> {
+            this.timeLimitTask = this.scheduler().submitTask(() -> {
-                if(!isRunning || timeLimit == 0) return TaskSchedule.stop();
+                if(!this.isRunning || this.timeLimit == 0) return TaskSchedule.stop();
-                if(timeLimit <= timePlayed) {
+                if(this.timeLimit <= this.timePlayed) {
-                    stop();
+                    this.stop();
                     return TaskSchedule.stop();
                 }
 
-                int timeLeft = timeLimit - timePlayed;
+                int timeLeft = this.timeLimit - this.timePlayed;
-                switch (timeLeft) {
+                switch(timeLeft) {
-                    case 90, 60, 30, 10, 5, 4, 3, 2, 1 ->
+                    case 90, 60, 30, 10, 5, 4, 3, 2, 1 -> new ChatMessage(Icon.TIME)
-                        new ChatMessage(Icon.TIME)
+                        .appendStatic(String.valueOf(timeLeft))
-                            .appendStatic(String.valueOf(timeLeft))
+                        .appendSpace()
-                            .appendSpace()
+                        .appendTranslated(timeLeft == 1 ? "common#secondsLeft_singular" : "common#secondsLeft_plural")
-                            .appendTranslated(timeLeft == 1 ? "common#secondsLeft_singular" : "common#secondsLeft_plural")
+                        .send(this.getPlayers());
-                            .send(getPlayers());
                 }
 
-                timePlayed++;
+                this.timePlayed++;
 
                 return TaskSchedule.seconds(1);
             }, ExecutionType.TICK_START);
@@ -84,7 +83,7 @@ public class StatelessGame extends Game {
         Duration fadeIn = Duration.ofMillis(300);
         Duration stay = Duration.ofMillis(700);
 
-        return new Countdown(TitleMessage.class)
+        return new Countdown()
             .countdown(
                 Audience.audience(this.getPlayers()),
                 5,
@@ -102,26 +101,27 @@ public class StatelessGame extends Game {
     public void startAccessor() {
         this.start();
     }
+
     @Override
     protected void start() {
-        score.setInstance(this);
+        this.score.setInstance(this);
-        score.attachListeners();
+        this.score.attachListeners();
 
-        countdownStart().thenRun(super::start);
+        this.countdownStart().thenRun(super::start);
     }
 
     @Override
     public void stop() {
-        isRunning = false;
+        this.isRunning = false;
         this.onStop();
-        getScore().insertRemainingPlayers(getPlayers());
+        this.getScore().insertRemainingPlayers(this.getPlayers());
-        this.publishScore(getScore());
+        this.publishScore(this.getScore());
 
-        countdownUnload();
+        this.countdownUnload();
     }
 
     private void countdownUnload() {
-        new TitleMessage(Duration.ofSeconds(1)).appendTranslated("score#done").send(getPlayers());
+        new TitleMessage(Duration.ofSeconds(1)).appendTranslated("score#done").send(this.getPlayers());
-        scheduler().scheduleTask(this::unload, TaskSchedule.seconds(5), TaskSchedule.stop());
+        this.scheduler().scheduleTask(this::unload, TaskSchedule.seconds(5), TaskSchedule.stop());
     }
 }

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/config/ConfigManager.java

@@ -5,12 +5,12 @@ import java.util.ArrayList;
 public class ConfigManager {
     private final ArrayList<Option<?>> items = new ArrayList<>();
 
-    public ConfigManager addOption(Option option) {
+    public ConfigManager addOption(Option<?> option) {
-        items.add(option);
+        this.items.add(option);
         return this;
     }
 
     public ArrayList<Option<?>> getAll() {
-        return items;
+        return this.items;
     }
 }

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/config/GameConfigurationInventory.java

@@ -4,20 +4,19 @@ import eu.mhsl.minenet.minigames.instance.game.Game;
 import eu.mhsl.minenet.minigames.instance.game.stateless.config.restriction.Restriction;
 import eu.mhsl.minenet.minigames.instance.game.stateless.config.restriction.RestrictionData;
 import eu.mhsl.minenet.minigames.instance.game.stateless.config.restriction.RestrictionHandler;
+import eu.mhsl.minenet.minigames.instance.room.Room;
 import eu.mhsl.minenet.minigames.message.component.TranslatedComponent;
 import eu.mhsl.minenet.minigames.shared.inventory.InteractableInventory;
 import eu.mhsl.minenet.minigames.util.InventoryItemAlignment;
-import eu.mhsl.minenet.minigames.instance.room.Room;
 import net.kyori.adventure.sound.Sound;
 import net.kyori.adventure.text.format.NamedTextColor;
 import net.minestom.server.MinecraftServer;
 import net.minestom.server.entity.Player;
-import net.minestom.server.event.EventListener;
 import net.minestom.server.event.instance.AddEntityToInstanceEvent;
 import net.minestom.server.event.instance.RemoveEntityFromInstanceEvent;
+import net.minestom.server.event.inventory.InventoryPreClickEvent;
 import net.minestom.server.inventory.InventoryType;
-import net.minestom.server.inventory.click.ClickType;
+import net.minestom.server.inventory.click.Click;
-import net.minestom.server.inventory.condition.InventoryConditionResult;
 import net.minestom.server.item.ItemStack;
 import net.minestom.server.item.Material;
 import net.minestom.server.sound.SoundEvent;
@@ -40,54 +39,54 @@ public class GameConfigurationInventory extends InteractableInventory {
         this.factory = factory;
 
         room.eventNode()
-                .addListener(AddEntityToInstanceEvent.class, addEntityToInstanceEvent -> MinecraftServer.getSchedulerManager().scheduleNextTick(this::updatePlayButton))
+            .addListener(AddEntityToInstanceEvent.class, addEntityToInstanceEvent -> MinecraftServer.getSchedulerManager().scheduleNextTick(this::updatePlayButton))
-                .addListener(RemoveEntityFromInstanceEvent.class, removeEntityFromInstanceEvent -> MinecraftServer.getSchedulerManager().scheduleNextTick(this::updatePlayButton));
+            .addListener(RemoveEntityFromInstanceEvent.class, removeEntityFromInstanceEvent -> MinecraftServer.getSchedulerManager().scheduleNextTick(this::updatePlayButton));
 
         ConfigManager config = factory.configuration();
 
-        setClickableItem(
+        this.setClickableItem(
-                ItemStack.builder(Material.RED_WOOL)
+            ItemStack.builder(Material.RED_WOOL)
-                        .customName(
+                .customName(
-                                TranslatedComponent.byId("common#back")
+                    TranslatedComponent.byId("common#back")
-                                        .setColor(NamedTextColor.RED)
+                        .setColor(NamedTextColor.RED)
-                                        .getAssembled(p)
+                        .getAssembled(p)
-                        )
+                )
-                        .build(),
+                .build(),
-                0,
+            0,
-                itemClick -> itemClick.getPlayer().closeInventory(),
+            itemClick -> itemClick.getPlayer().closeInventory(),
-                true
+            true
         );
 
-        setDummyItem(Material.BLACK_STAINED_GLASS_PANE,1);
+        this.setDummyItem(Material.BLACK_STAINED_GLASS_PANE, 1);
 
-        setDummyItem(
+        this.setDummyItem(
-                ItemStack.builder(Material.NAME_TAG)
+            ItemStack.builder(Material.NAME_TAG)
-                        .customName(
+                .customName(
-                                factory.name().setColor(NamedTextColor.GOLD).getAssembled(p)
+                    factory.name().setColor(NamedTextColor.GOLD).getAssembled(p)
-                        )
+                )
-                        .build(),
+                .build(),
-                4
+            4
         );
 
-        setDummyItem(Material.BLACK_STAINED_GLASS_PANE,7);
+        this.setDummyItem(Material.BLACK_STAINED_GLASS_PANE, 7);
 
-        updatePlayButton();
+        this.updatePlayButton();
 
         for(int i = 9; i <= 17; i++) {
-            setDummyItem(Material.BLACK_STAINED_GLASS_PANE, i);
+            this.setDummyItem(Material.BLACK_STAINED_GLASS_PANE, i);
         }
 
         if(config == null) {
-            setDummyItem(
+            this.setDummyItem(
-                    ItemStack.builder(Material.BARRIER)
+                ItemStack.builder(Material.BARRIER)
-                            .customName(
+                    .customName(
-                                    TranslatedComponent.byId("room#noOption").setColor(NamedTextColor.RED).getAssembled(p)
+                        TranslatedComponent.byId("room#noOption").setColor(NamedTextColor.RED).getAssembled(p)
-                            )
+                    )
-                            .lore(
+                    .lore(
-                                    TranslatedComponent.assemble("room#noOptionDescription", p)
+                        TranslatedComponent.assemble("room#noOptionDescription", p)
-                            )
+                    )
-                            .build(),
+                    .build(),
-                    31
+                31
             );
 
         } else {
@@ -95,11 +94,11 @@ public class GameConfigurationInventory extends InteractableInventory {
             InventoryItemAlignment itemAlignment = new InventoryItemAlignment(config.getAll().size(), 3);
             for(Option<?> item : config.getAll()) {
                 InventoryItemAlignment.ItemOffset current = itemAlignment.next();
-                map.put(offset + current.get(), item);
+                this.map.put(offset + current.get(), item);
 
-                setDummyItem(
+                this.setDummyItem(
-                        item.getCurrent(p),
+                    item.getCurrent(p),
-                        offset + current.get()
+                    offset + current.get()
                 );
             }
         }
@@ -107,62 +106,62 @@ public class GameConfigurationInventory extends InteractableInventory {
     }
 
     @Override
-    protected void onClick(Player player, int slot, ClickType clickType, InventoryConditionResult inventoryConditionResult) {
+    protected void onClick(Player player, int slot, Click click, InventoryPreClickEvent event) {
-        inventoryConditionResult.setCancel(true);
+        event.setCancelled(true);
 
-        if(!map.containsKey(slot)) return;
+        if(!this.map.containsKey(slot)) return;
 
-        Option<?> item = map.get(slot);
+        Option<?> item = this.map.get(slot);
-        setDummyItem(
+        this.setDummyItem(
-                item.getNext(p),
+            item.getNext(this.p),
-                slot
+            slot
         );
 
-        update();
+        this.update();
 
     }
 
     private void updatePlayButton() {
-        RestrictionHandler restrictionHandler = factory.globalRestrictions();
+        RestrictionHandler restrictionHandler = this.factory.globalRestrictions();
-        RestrictionData restrictionData = new RestrictionData(room);
+        RestrictionData restrictionData = new RestrictionData(this.room);
 
         if(restrictionHandler.canPlay(restrictionData)) {
 
-            setClickableItem(
+            this.setClickableItem(
-                    ItemStack.builder(restrictionHandler.getWarnings(restrictionData).size() > 0 ? Material.YELLOW_WOOL : Material.GREEN_WOOL)
+                ItemStack.builder(!restrictionHandler.getWarnings(restrictionData).isEmpty() ? Material.YELLOW_WOOL : Material.GREEN_WOOL)
-                            .customName(TranslatedComponent.byId("restriction#success").setColor(NamedTextColor.GREEN).getAssembled(p))
+                    .customName(TranslatedComponent.byId("restriction#success").setColor(NamedTextColor.GREEN).getAssembled(this.p))
-                            .lore(restrictionHandler.getWarnings(restrictionData).stream().map(translatedComponent -> translatedComponent.getAssembled(p)).collect(Collectors.toList()))
+                    .lore(restrictionHandler.getWarnings(restrictionData).stream().map(translatedComponent -> translatedComponent.getAssembled(this.p)).collect(Collectors.toList()))
-                            .build(),
+                    .build(),
-                    8,
+                8,
-                    itemClick -> Game.initialize(factory, map.values().stream().toList(), itemClick.getPlayer()),
+                itemClick -> Game.initialize(this.factory, this.map.values().stream().toList(), itemClick.getPlayer()),
-                    true
+                true
             );
 
         } else {
 
-            setClickableItem(
+            this.setClickableItem(
-                    ItemStack.builder(Material.RED_WOOL)
+                ItemStack.builder(Material.RED_WOOL)
-                            .customName(TranslatedComponent.byId("restriction#fail").setColor(NamedTextColor.RED).getAssembled(p))
+                    .customName(TranslatedComponent.byId("restriction#fail").setColor(NamedTextColor.RED).getAssembled(this.p))
-                            .lore(
+                    .lore(
-                                    restrictionHandler.getRestrictions()
+                        restrictionHandler.getRestrictions()
-                                            .stream()
+                            .stream()
-                                            .filter(iRestriction -> iRestriction.calculate(restrictionData).type().equals(Restriction.Type.FAIL))
+                            .filter(iRestriction -> iRestriction.calculate(restrictionData).type().equals(Restriction.Type.FAIL))
-                                            .map(iRestriction -> iRestriction.calculate(restrictionData).description().getAssembled(p))
+                            .map(iRestriction -> iRestriction.calculate(restrictionData).description().getAssembled(this.p))
-                                            .collect(Collectors.toList()))
+                            .collect(Collectors.toList()))
-                            .build(),
+                    .build(),
-                    8,
+                8,
-                    itemClick -> {
+                itemClick -> {
-                        if(restrictionHandler.canPlay(restrictionData)) {
+                    if(restrictionHandler.canPlay(restrictionData)) {
-                            updatePlayButton();
+                        this.updatePlayButton();
-                            return;
+                        return;
-                        }
+                    }
-                        itemClick.getPlayer().playSound(Sound.sound(SoundEvent.ENTITY_SILVERFISH_DEATH, Sound.Source.AMBIENT, 1f, 1f));
+                    itemClick.getPlayer().playSound(Sound.sound(SoundEvent.ENTITY_SILVERFISH_DEATH, Sound.Source.AMBIENT, 1f, 1f));
-                    },
+                },
-                    false
+                false
             );
 
         }
 
-        update();
+        this.update();
     }
 }

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/config/GameFactory.java

@@ -12,9 +12,11 @@ import java.util.Map;
 
 public interface GameFactory {
     TranslatedComponent name();
+
     default ConfigManager configuration() {
         return null;
     }
+
     default RestrictionHandler globalRestrictions() {
         return new RestrictionHandler();
     }
@@ -22,6 +24,7 @@ public interface GameFactory {
     default Material symbol() {
         return Material.GRASS_BLOCK;
     }
+
     default TranslatedComponent description() {
         return TranslatedComponent.byId("GameFactory#missingDescription");
     }
@@ -29,17 +32,17 @@ public interface GameFactory {
     Game manufacture(Room parent, Map<String, Option<?>> configuration) throws Exception;
 
     default Game manufacture(Room parent, List<Option<?>> configuration) throws Exception {
-        if(configuration == null) return manufacture(parent);
+        if(configuration == null) return this.manufacture(parent);
 
         Map<String, Option<?>> cnf = new HashMap<>();
         configuration.forEach(option -> cnf.put(option.getId(), option));
 
-        return manufacture(parent, cnf);
+        return this.manufacture(parent, cnf);
     }
 
     default Game manufacture(Room parent) throws Exception {
-        if(this.configuration() == null) return manufacture(parent, List.of());
+        if(this.configuration() == null) return this.manufacture(parent, List.of());
 
-        return manufacture(parent, this.configuration().getAll());
+        return this.manufacture(parent, this.configuration().getAll());
     }
 }

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/config/Option.java

@@ -12,12 +12,12 @@ import java.util.List;
 import java.util.Objects;
 
 public abstract class Option<T> {
-    private RestrictionHandler restrictionHandler;
     private final Material item;
     private final TranslatedComponent name;
     private final String id;
-    protected T currentValue;
     private final List<T> options;
+    protected T currentValue;
+    private RestrictionHandler restrictionHandler;
     private int pointer = 0;
 
     public Option(String id, Material item, TranslatedComponent name, List<T> options) {
@@ -26,46 +26,45 @@ public abstract class Option<T> {
         this.name = name;
         this.options = options;
 
-        currentValue = options.getFirst();
+        this.currentValue = options.getFirst();
+    }
+
+    public RestrictionHandler getRestrictionHandler() {
+        return this.restrictionHandler;
     }
 
     public void setRestrictionHandler(RestrictionHandler restrictionHandler) {
         this.restrictionHandler = restrictionHandler;
     }
 
-    public RestrictionHandler getRestrictionHandler() {
-        return restrictionHandler;
-    }
-
-
     public ItemStack getNext(Player p) {
-        if(++pointer >= options.size()) pointer = 0;
+        if(++this.pointer >= this.options.size()) this.pointer = 0;
-        currentValue = options.get(pointer);
+        this.currentValue = this.options.get(this.pointer);
-        return getCurrent(p);
+        return this.getCurrent(p);
     }
 
     public ItemStack getCurrent(Player p) {
-        String value = options.get(pointer).toString();
+        String value = this.options.get(this.pointer).toString();
-        return ItemStack.builder(item)
+        return ItemStack.builder(this.item)
-                .customName(name.getAssembled(p))
+            .customName(this.name.getAssembled(p))
-                .lore(TranslatedComponent.byId("optionCommon#value").setColor(NamedTextColor.GOLD).getAssembled(p)
+            .lore(TranslatedComponent.byId("optionCommon#value").setColor(NamedTextColor.GOLD).getAssembled(p)
-                        .append(Component.text(": ")).append(Component.text(value)))
+                .append(Component.text(": ")).append(Component.text(value)))
-                .build();
+            .build();
     }
 
     public int getAsInt() {
-        return Integer.parseInt(getAsString());
+        return Integer.parseInt(this.getAsString());
     }
 
     public boolean getAsBoolean() {
-        return Objects.equals(getAsString(), "true") || Objects.equals(getAsString(), "1");
+        return Objects.equals(this.getAsString(), "true") || Objects.equals(this.getAsString(), "1");
     }
 
     public String getAsString() {
-        return currentValue.toString();
+        return this.currentValue.toString();
     }
 
     public String getId() {
-        return id;
+        return this.id;
     }
 }

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/config/restriction/Restriction.java

@@ -10,7 +10,7 @@ public record Restriction(TranslatedComponent name, TranslatedComponent descript
         this.warnMessage = warnMessage;
         this.type = type;
 
-        if (this.warnMessage == null && this.type.equals(Type.WARN)) {
+        if(this.warnMessage == null && this.type.equals(Type.WARN)) {
             throw new IllegalStateException("warnMessage cannot be null when RestrictionType is WARN");
         }
     }

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/config/restriction/RestrictionHandler.java

@@ -22,18 +22,18 @@ public class RestrictionHandler {
     }
 
     public List<IRestriction> getRestrictions() {
-        return restrictions;
+        return this.restrictions;
     }
 
     public boolean canPlay(RestrictionData data) {
-        if(restrictions.size() < 1) return true;
+        if(this.restrictions.isEmpty()) return true;
         return this.restrictions.stream()
-                .noneMatch(iRestriction -> iRestriction.calculate(data).type().equals(Restriction.Type.FAIL));
+            .noneMatch(iRestriction -> iRestriction.calculate(data).type().equals(Restriction.Type.FAIL));
     }
 
     public List<TranslatedComponent> getWarnings(RestrictionData data) {
         List<TranslatedComponent> warnings = new ArrayList<>();
-        for (IRestriction r : this.restrictions) {
+        for(IRestriction r : this.restrictions) {
             Restriction calculated = r.calculate(data);
             if(!calculated.type().equals(Restriction.Type.WARN)) continue;
 

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/config/restriction/common/MaximalPlayeramountGameRestriction.java

@@ -15,10 +15,10 @@ public class MaximalPlayeramountGameRestriction implements IRestriction {
     @Override
     public Restriction calculate(RestrictionData data) {
         return new Restriction(
-                TranslatedComponent.byId("restriction#maxPlayersInRoom"),
+            TranslatedComponent.byId("restriction#maxPlayersInRoom"),
-                TranslatedComponent.byId("restriction#maxPlayersInRoomDescription"),
+            TranslatedComponent.byId("restriction#maxPlayersInRoomDescription"),
-                null,
+            null,
-                data.room().getAllMembers().size() > this.max ? Restriction.Type.FAIL : Restriction.Type.OK
+            data.room().getAllMembers().size() > this.max ? Restriction.Type.FAIL : Restriction.Type.OK
         );
     }
 }

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/config/restriction/common/MinimalPlayeramountGameRestriction.java

@@ -15,10 +15,10 @@ public class MinimalPlayeramountGameRestriction implements IRestriction {
     @Override
     public Restriction calculate(RestrictionData data) {
         return new Restriction(
-                TranslatedComponent.byId("restriction#minPlayersInRoom"),
+            TranslatedComponent.byId("restriction#minPlayersInRoom"),
-                TranslatedComponent.byId("restriction#minPlayersInRoomDescription"),
+            TranslatedComponent.byId("restriction#minPlayersInRoomDescription"),
-                null,
+            null,
-                data.room().getAllMembers().size() < this.min ? Restriction.Type.FAIL : Restriction.Type.OK
+            data.room().getAllMembers().size() < this.min ? Restriction.Type.FAIL : Restriction.Type.OK
         );
     }
 }

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/acidRain/AcidRain.java

@@ -1,6 +1,7 @@
 package eu.mhsl.minenet.minigames.instance.game.stateless.types.acidRain;
 
-import de.articdive.jnoise.JNoise;
+import de.articdive.jnoise.generators.noisegen.opensimplex.FastSimplexNoiseGenerator;
+import de.articdive.jnoise.pipeline.JNoise;
 import eu.mhsl.minenet.minigames.instance.Dimension;
 import eu.mhsl.minenet.minigames.instance.game.stateless.StatelessGame;
 import eu.mhsl.minenet.minigames.score.LastWinsScore;
@@ -27,26 +28,25 @@ import java.util.concurrent.CompletableFuture;
 
 
 public class AcidRain extends StatelessGame {
-    final private int radius = 20;
-    private int generationOffset = 0;
-
-    final private int roofHeight = 55;
-    private int difficulty = 0;
     final JNoise noise = JNoise.newBuilder()
-            .fastSimplex()
+        .fastSimplex(FastSimplexNoiseGenerator.newBuilder().setSeed(this.rnd.nextLong()).build())
-            .setSeed(rnd.nextLong())
+        .scale(0.09)
-            .setFrequency(0.09)
+        .build();
-            .build();
+    final private int radius = 20;
+    final private int roofHeight = 55;
+    private int generationOffset = 0;
+    private int difficulty = 0;
+
     public AcidRain() {
         super(Dimension.OVERWORLD.key, "acidRain", new LastWinsScore());
-        setGenerator(
+        this.setGenerator(
-                new CircularPlateTerrainGenerator(radius)
+            new CircularPlateTerrainGenerator(this.radius)
-                        .setPlateHeight(50)
+                .setPlateHeight(50)
-                        .setPlatePallet(BlockPallet.STONE)
+                .setPlatePallet(BlockPallet.STONE)
         );
 
 
-        eventNode().addListener(PlayerTickEvent.class, this::onPlayerTick);
+        this.eventNode().addListener(PlayerTickEvent.class, this::onPlayerTick);
     }
 
     @Override
@@ -61,39 +61,40 @@ public class AcidRain extends StatelessGame {
 
         MinecraftServer.getSchedulerManager().submitTask(() -> {
 
-            getPlayers().forEach(player -> {
+            this.getPlayers().forEach(player -> {
-                player.sendPacket(new ParticlePacket(Particle.SNEEZE, 0, 60, 0, radius, radius, radius, 1f, 500));
+                player.sendPacket(new ParticlePacket(Particle.SNEEZE, 0, 60, 0, this.radius, this.radius, this.radius, 1f, 500));
-                player.sendPacket(new ParticlePacket(Particle.ITEM_SLIME, 0, 60, 0, radius, radius, radius, 1f, 500));
+                player.sendPacket(new ParticlePacket(Particle.ITEM_SLIME, 0, 60, 0, this.radius, this.radius, this.radius, 1f, 500));
             });
 
-            if(!isRunning) return TaskSchedule.stop();
+            if(!this.isRunning) return TaskSchedule.stop();
             return TaskSchedule.millis(100);
         }, ExecutionType.TICK_END);
 
         MinecraftServer.getSchedulerManager().submitTask(() -> {
-            generationOffset++;
+            this.generationOffset++;
-            generatePlatform(generationOffset);
+            this.generatePlatform(this.generationOffset);
 
-            if(!isRunning) return TaskSchedule.stop();
+            if(!this.isRunning) return TaskSchedule.stop();
-            return TaskSchedule.millis((long) NumberUtil.map(50 - difficulty, 0, 50, 100, 1000));
+            return TaskSchedule.millis((long) NumberUtil.map(50 - this.difficulty, 0, 50, 100, 1000));
         }, ExecutionType.TICK_END);
 
         MinecraftServer.getSchedulerManager().submitTask(() -> {
-            difficulty++;
+            this.difficulty++;
 
-            if(difficulty >= 50) return TaskSchedule.stop();
+            if(this.difficulty >= 50) return TaskSchedule.stop();
             return TaskSchedule.seconds(3);
         });
     }
 
     @Override
     protected void onPlayerMove(@NotNull PlayerMoveEvent playerMoveEvent) {
-        if(playerMoveEvent.getNewPosition().y() < 50) playerDeath(playerMoveEvent.getPlayer());
+        if(playerMoveEvent.getNewPosition().y() < 50) this.playerDeath(playerMoveEvent.getPlayer());
     }
 
     private void onPlayerTick(PlayerTickEvent playerTickEvent) {
-        if(isBeforeBeginning) return;
+        if(this.isBeforeBeginning) return;
-        if(getBlock(playerTickEvent.getPlayer().getPosition().withY(roofHeight)).isAir()) playerDeath(playerTickEvent.getPlayer());
+        if(this.getBlock(playerTickEvent.getPlayer().getPosition().withY(this.roofHeight)).isAir())
+            this.playerDeath(playerTickEvent.getPlayer());
     }
 
     private void generatePlatform(long offset) {
@@ -102,19 +103,20 @@ public class AcidRain extends StatelessGame {
         AbsoluteBlockBatch batch = new AbsoluteBlockBatch();
         for(int x = -radius; x <= radius; x++) {
             for(int z = -radius; z <= radius; z++) {
-                batch.setBlock(x, roofHeight, z, Block.AIR);
+                batch.setBlock(x, this.roofHeight, z, Block.AIR);
                 if(new Pos(x, 0, z).distance(new Pos(0, 0, 0)) > radius) continue;
-                if(noise.getNoise(x + offset, z + offset) > 0.4) continue;
+                if(this.noise.evaluateNoise(x + offset, z + offset) > 0.4) continue;
 
-                batch.setBlock(x, roofHeight, z, Block.OAK_PLANKS);
+                batch.setBlock(x, this.roofHeight, z, Block.OAK_PLANKS);
             }
         }
-        BatchUtil.loadAndApplyBatch(batch, this, () -> {});
+        BatchUtil.loadAndApplyBatch(batch, this, () -> {
+        });
     }
 
     private void playerDeath(Player p) {
         p.setGameMode(GameMode.SPECTATOR);
-        getScore().insertResult(p);
+        this.getScore().insertResult(p);
     }
 
     @Override

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/anvilRun/AnvilRun.java

@@ -1,8 +1,8 @@
 package eu.mhsl.minenet.minigames.instance.game.stateless.types.anvilRun;
 
+import eu.mhsl.minenet.minigames.instance.Dimension;
 import eu.mhsl.minenet.minigames.instance.game.stateless.StatelessGame;
 import eu.mhsl.minenet.minigames.score.LastWinsScore;
-import eu.mhsl.minenet.minigames.instance.Dimension;
 import eu.mhsl.minenet.minigames.util.BatchUtil;
 import eu.mhsl.minenet.minigames.world.generator.terrain.CircularPlateTerrainGenerator;
 import net.minestom.server.MinecraftServer;
@@ -27,10 +27,10 @@ class AnvilRun extends StatelessGame {
 
     final int spawnHeight = 30;
     final int radius;
-    int anvilsPerSecond;
     final int seconds;
     final int anvilHeight = 200;
     final List<Pos> anvilSpawnPositions = new ArrayList<>();
+    int anvilsPerSecond;
 
     public AnvilRun(int radius, int seconds) {
         super(Dimension.OVERWORLD.key, "Anvil Run", new LastWinsScore());
@@ -38,25 +38,25 @@ class AnvilRun extends StatelessGame {
         this.seconds = seconds;
         this.setGenerator(new CircularPlateTerrainGenerator(radius));
 
-        eventNode().addListener(EntityTickEvent.class, this::onEntityTick);
+        this.eventNode().addListener(EntityTickEvent.class, this::onEntityTick);
     }
 
     @Override
     protected void onLoad(@NotNull CompletableFuture<Void> callback) {
         AbsoluteBlockBatch batch = new AbsoluteBlockBatch();
 
-        for(int x = -radius; x <= radius; x++) {
+        for(int x = -this.radius; x <= this.radius; x++) {
-            for (int z = -radius; z <= radius; z++) {
+            for(int z = -this.radius; z <= this.radius; z++) {
-                if(new Pos(x, 0, z).distance(new Pos(0, 0, 0)) > radius) continue;
+                if(new Pos(x, 0, z).distance(new Pos(0, 0, 0)) > this.radius) continue;
 
-                anvilSpawnPositions.add(new Pos(x+0.5, anvilHeight, z+0.5));
+                this.anvilSpawnPositions.add(new Pos(x + 0.5, this.anvilHeight, z + 0.5));
 
-                batch.setBlock(x, spawnHeight-1, z, Block.SNOW_BLOCK);
+                batch.setBlock(x, this.spawnHeight - 1, z, Block.SNOW_BLOCK);
             }
         }
 
-        this.anvilsPerSecond = anvilSpawnPositions.size() / this.seconds;
+        this.anvilsPerSecond = this.anvilSpawnPositions.size() / this.seconds;
-        Collections.shuffle(anvilSpawnPositions);
+        Collections.shuffle(this.anvilSpawnPositions);
 
         BatchUtil.loadAndApplyBatch(batch, this, () -> callback.complete(null));
     }
@@ -72,12 +72,12 @@ class AnvilRun extends StatelessGame {
         super.onStart();
 
         Scheduler scheduler = MinecraftServer.getSchedulerManager();
-        for(int i=0; i<this.anvilSpawnPositions.size(); i++) {
+        for(int i = 0; i < this.anvilSpawnPositions.size(); i++) {
             final int j = i;
             scheduler.scheduleTask(
-                () -> spawnAnvil(this.anvilSpawnPositions.get(j)),
+                () -> this.spawnAnvil(this.anvilSpawnPositions.get(j)),
                 TaskSchedule.millis(
-                    (long) Math.floor((double) i/this.anvilsPerSecond * 1000)
+                    (long) Math.floor((double) i / this.anvilsPerSecond * 1000)
                 ),
                 TaskSchedule.stop()
             );
@@ -87,25 +87,26 @@ class AnvilRun extends StatelessGame {
     @Override
     protected void onPlayerMove(@NotNull PlayerMoveEvent playerMoveEvent) {
         super.onPlayerMove(playerMoveEvent);
-        if(isBeforeBeginning && playerMoveEvent.getNewPosition().y() < spawnHeight - 2) {
+        if(this.isBeforeBeginning && playerMoveEvent.getNewPosition().y() < this.spawnHeight - 2) {
             playerMoveEvent.setCancelled(true);
-            playerMoveEvent.getPlayer().teleport(getSpawn());
+            playerMoveEvent.getPlayer().teleport(this.getSpawn());
             return;
         }
-        if(playerMoveEvent.getNewPosition().y() < spawnHeight - 2) getScore().insertResult(playerMoveEvent.getPlayer());
+        if(playerMoveEvent.getNewPosition().y() < this.spawnHeight - 2)
+            this.getScore().insertResult(playerMoveEvent.getPlayer());
     }
 
     protected void onEntityTick(@NotNull EntityTickEvent entityTickEvent) {
         if(!entityTickEvent.getEntity().getEntityType().equals(EntityType.FALLING_BLOCK)) return;
         Pos anvilPosition = entityTickEvent.getEntity().getPosition();
-        if(anvilPosition.y() > spawnHeight + 0.5) return;
+        if(anvilPosition.y() > this.spawnHeight + 0.5) return;
-        if(anvilPosition.y() < spawnHeight - 3) entityTickEvent.getEntity().remove();
+        if(anvilPosition.y() < this.spawnHeight - 3) entityTickEvent.getEntity().remove();
-        if(this.getBlock(anvilPosition.withY(spawnHeight-1)).isAir()) return;
+        if(this.getBlock(anvilPosition.withY(this.spawnHeight - 1)).isAir()) return;
-        this.setBlock(anvilPosition.withY(spawnHeight-1), Block.AIR);
+        this.setBlock(anvilPosition.withY(this.spawnHeight - 1), Block.AIR);
     }
 
     @Override
     public Pos getSpawn() {
-        return new Pos(0, spawnHeight, 0);
+        return new Pos(0, this.spawnHeight, 0);
     }
 }

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/anvilRun/AnvilRunFactory.java

@@ -1,9 +1,9 @@
 package eu.mhsl.minenet.minigames.instance.game.stateless.types.anvilRun;
 
 import eu.mhsl.minenet.minigames.instance.game.Game;
+import eu.mhsl.minenet.minigames.instance.game.stateless.config.ConfigManager;
 import eu.mhsl.minenet.minigames.instance.game.stateless.config.GameFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.config.Option;
-import eu.mhsl.minenet.minigames.instance.game.stateless.config.ConfigManager;
 import eu.mhsl.minenet.minigames.instance.game.stateless.config.common.NumericOption;
 import eu.mhsl.minenet.minigames.instance.room.Room;
 import eu.mhsl.minenet.minigames.message.component.TranslatedComponent;

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/Backrooms.java

@@ -1,20 +0,0 @@
-package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms;
-
-import eu.mhsl.minenet.minigames.instance.Dimension;
-import eu.mhsl.minenet.minigames.instance.game.stateless.StatelessGame;
-import eu.mhsl.minenet.minigames.score.NoScore;
-import net.minestom.server.event.player.PlayerBlockBreakEvent;
-import org.jetbrains.annotations.NotNull;
-
-public class Backrooms extends StatelessGame {
-    public Backrooms() {
-        super(Dimension.NETHER.key, "Backrooms", new NoScore());
-        BackroomsGenerator generator = new BackroomsGenerator();
-        setGenerator(unit -> generator.generateRoom(unit, 50));
-    }
-
-    @Override
-    protected void onBlockBreak(@NotNull PlayerBlockBreakEvent playerBlockBreakEvent) {
-        playerBlockBreakEvent.setCancelled(false);
-    }
-}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/BackroomsFactory.java

@@ -1,21 +1,52 @@
 package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms;
 
 import eu.mhsl.minenet.minigames.instance.game.Game;
+import eu.mhsl.minenet.minigames.instance.game.stateless.config.ConfigManager;
 import eu.mhsl.minenet.minigames.instance.game.stateless.config.GameFactory;
 import eu.mhsl.minenet.minigames.instance.game.stateless.config.Option;
+import eu.mhsl.minenet.minigames.instance.game.stateless.config.common.NumericOption;
 import eu.mhsl.minenet.minigames.instance.room.Room;
 import eu.mhsl.minenet.minigames.message.component.TranslatedComponent;
+import net.minestom.server.item.Material;
 
 import java.util.Map;
 
 public class BackroomsFactory implements GameFactory {
     @Override
     public TranslatedComponent name() {
-        return TranslatedComponent.byId("gameBackrooms");
+        return TranslatedComponent.byId("game_Backrooms#name");
+    }
+
+    @Override
+    public TranslatedComponent description() {
+        return TranslatedComponent.byId("game_Backrooms#description");
+    }
+
+    @Override
+    public Material symbol() {
+        return Material.YELLOW_TERRACOTTA;
+    }
+
+    @Override
+    public ConfigManager configuration() {
+        return new ConfigManager()
+            .addOption(new NumericOption("levels", Material.LADDER, TranslatedComponent.byId("game_Backrooms#optionLevels"), 3, 2, 4, 5))
+            .addOption(new NumericOption("lives", Material.TOTEM_OF_UNDYING, TranslatedComponent.byId("game_Backrooms#optionLives"), 3, 1, 2, 5))
+            .addOption(new NumericOption("monsterDensity", Material.ZOMBIE_HEAD, TranslatedComponent.byId("game_Backrooms#optionMonsterDensity"), 2, 1, 3))
+            .addOption(new NumericOption("size", Material.MAP, TranslatedComponent.byId("game_Backrooms#optionSize"), 0, 1, 2, 3))
+            // 0/1 statt BoolOption: deren erster Eintrag "true" waere sonst der Default
+            .addOption(new NumericOption("hardcoreSanity", Material.WITHER_ROSE, TranslatedComponent.byId("game_Backrooms#optionHardcoreSanity"), 0, 1));
     }
 
     @Override
     public Game manufacture(Room parent, Map<String, Option<?>> configuration) throws Exception {
-        return new Backrooms().setParent(parent);
+        return new BackroomsGame(
+            configuration.get("levels").getAsInt(),
+            configuration.get("lives").getAsInt(),
+            configuration.get("monsterDensity").getAsInt(),
+            configuration.get("size").getAsInt(),
+            configuration.get("hardcoreSanity").getAsBoolean(),
+            parent.getAllMembers().size()
+        ).setParent(parent);
     }
 }

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/BackroomsGame.java

@@ -0,0 +1,663 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms;
+
+import eu.mhsl.minenet.minigames.instance.Dimension;
+import eu.mhsl.minenet.minigames.instance.game.stateless.StatelessGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience.AmbienceEngine;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.door.DoorManager;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.generator.BackroomsChunkGenerator;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.generator.MazeAlgorithms;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.item.BackroomsItems;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelDefinition;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.TransitionType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl.Level0Lobby;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl.LevelFinale;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl.LevelFun;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl.LevelHabitableZone;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl.LevelLightsOut;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl.LevelPipeDreams;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl.LevelPoolrooms;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.loot.ChestManager;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.BackroomsMonster;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.sanity.SanityManager;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.transition.TransitionManager;
+import eu.mhsl.minenet.minigames.message.Icon;
+import eu.mhsl.minenet.minigames.message.component.TranslatedComponent;
+import eu.mhsl.minenet.minigames.message.type.ChatMessage;
+import eu.mhsl.minenet.minigames.message.type.TitleMessage;
+import net.kyori.adventure.sound.Sound;
+import java.time.Duration;
+import net.kyori.adventure.text.Component;
+import net.minestom.server.MinecraftServer;
+import net.minestom.server.coordinate.Pos;
+import net.minestom.server.entity.GameMode;
+import net.minestom.server.entity.Player;
+import net.minestom.server.event.entity.EntityAttackEvent;
+import net.minestom.server.event.entity.EntityDamageEvent;
+import net.minestom.server.event.player.PlayerBlockInteractEvent;
+import net.minestom.server.event.player.PlayerMoveEvent;
+import net.minestom.server.event.player.PlayerUseItemEvent;
+import net.minestom.server.instance.LightingChunk;
+import net.minestom.server.entity.attribute.Attribute;
+import net.minestom.server.entity.damage.DamageType;
+import net.minestom.server.item.ItemStack;
+import net.minestom.server.potion.Potion;
+import net.minestom.server.potion.PotionEffect;
+import net.minestom.server.scoreboard.Sidebar;
+import net.minestom.server.sound.SoundEvent;
+import net.minestom.server.timer.ExecutionType;
+import net.minestom.server.timer.TaskSchedule;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Random;
+import java.util.Set;
+import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
+import java.util.function.Supplier;
+
+/**
+ * Backrooms: Wettlauf durch prozedural generierte, vertikal gestapelte Horror-Level.
+ * Wer zuerst durch alle Level entkommt gewinnt; sterben alle anderen, gewinnt der
+ * letzte Ueberlebende. Kein Spieler-Schaden untereinander — nur die Backrooms selbst.
+ */
+public class BackroomsGame extends StatelessGame {
+    /** Zufalls-Pool der Zwischen-Level; wird mit jedem fertigen Leveltyp erweitert. */
+    private static final List<Supplier<LevelDefinition>> LEVEL_POOL = List.of(
+        LevelHabitableZone::new,
+        LevelPipeDreams::new,
+        LevelPoolrooms::new,
+        LevelLightsOut::new,
+        LevelFun::new
+    );
+
+    private final List<LevelRuntime> levels = new ArrayList<>();
+    private final Map<UUID, BackroomsPlayer> playerStates = new HashMap<>();
+    private final Map<UUID, Sidebar> sidebars = new HashMap<>();
+
+    private final int lives;
+    private final int monsterDensity;
+    private final boolean hardcoreSanity;
+
+    private final TransitionManager transitionManager = new TransitionManager(this);
+    private final ChestManager chestManager;
+    private final DoorManager doorManager = new DoorManager(this);
+    private final SanityManager sanityManager;
+    private final AmbienceEngine ambienceEngine = new AmbienceEngine(this);
+
+    private final Set<Integer> openedDoorLevels = new HashSet<>();
+
+    private long tickCounter = 0;
+    private long secondCounter = 0;
+
+    public BackroomsGame(int totalLevels, int lives, int monsterDensity, int sizeOption, boolean hardcoreSanity, int expectedPlayers) {
+        super(Dimension.BACKROOMS.key, "Backrooms", new BackroomsScore());
+        this.getScore().setIgnoreLastPlayers(1);
+        this.lives = lives;
+        this.monsterDensity = monsterDensity;
+        this.hardcoreSanity = hardcoreSanity;
+        this.sanityManager = new SanityManager(this, hardcoreSanity);
+
+        int cells = this.cellsForSize(sizeOption, expectedPlayers);
+
+        List<LevelDefinition> sequence = this.buildSequence(totalLevels);
+        for(int i = 0; i < sequence.size(); i++) {
+            LevelDefinition definition = sequence.get(i);
+            Random layoutRnd = new Random(this.rnd.nextLong());
+            var layout = definition.buildLayout(layoutRnd, cells, expectedPlayers);
+            this.levels.add(new LevelRuntime(this, i, definition, layout, layoutRnd));
+        }
+
+        this.connectShaftLandings();
+        // Echte Lichtberechnung: nur die Deckenlampen leuchten, Blackout-Biome sind
+        // tatsaechlich dunkel (Dimension-Ambient ist fast schwarz)
+        this.setChunkSupplier(LightingChunk::new);
+        this.setGenerator(new BackroomsChunkGenerator(this.levels));
+        this.chestManager = new ChestManager(this);
+
+        this.eventNode()
+            .addListener(PlayerBlockInteractEvent.class, event -> {
+                this.chestManager.onInteract(event);
+                this.doorManager.onInteract(event);
+            })
+            .addListener(PlayerUseItemEvent.class, this::onUseItem)
+            .addListener(EntityAttackEvent.class, this::onEntityAttack)
+            .addListener(EntityDamageEvent.class, this::onEntityDamage);
+    }
+
+    /**
+     * HOLE/LADDER-Schaechte enden im Level darunter an einer beliebigen Zelle.
+     * Die Landezelle wird freigeraeumt und per kuerzestem Wanddurchbruch mit dem
+     * Labyrinth verbunden, damit niemand in einer Wandtasche landet.
+     */
+    private void connectShaftLandings() {
+        for(int i = 0; i < this.levels.size() - 1; i++) {
+            LevelRuntime upper = this.levels.get(i);
+            TransitionType transition = upper.getDefinition().transitionType();
+            if(transition != TransitionType.HOLE && transition != TransitionType.LADDER) continue;
+
+            int[] exit = upper.getLayout().getExitCell();
+            if(exit == null) continue;
+
+            var lowerLayout = this.levels.get(i + 1).getLayout();
+            int landingX = lowerLayout.cellX(upper.getLayout().worldX(exit[0]) + 1);
+            int landingZ = lowerLayout.cellZ(upper.getLayout().worldZ(exit[1]) + 1);
+            if(!lowerLayout.inBounds(landingX, landingZ)) continue;
+            if(lowerLayout.isWalkable(landingX, landingZ)) continue;
+
+            lowerLayout.setCell(landingX, landingZ, LevelLayout.Cell.FLOOR);
+            MazeAlgorithms.ensureConnected(
+                lowerLayout,
+                lowerLayout.getSpawnCells().getFirst(),
+                List.of(new int[]{landingX, landingZ})
+            );
+        }
+    }
+
+    private int cellsForSize(int sizeOption, int expectedPlayers) {
+        int cells = switch(sizeOption) {
+            case 1 -> 25;
+            case 2 -> 37;
+            case 3 -> 49;
+            // Auto: waechst mit der Wurzel der Spielerzahl, damit 50 Spieler nicht clustern
+            default -> 23 + 5 * (int) Math.ceil(Math.sqrt(Math.max(1, expectedPlayers)));
+        };
+        cells = Math.min(63, cells);
+        return cells % 2 == 0 ? cells + 1 : cells;
+    }
+
+    private List<LevelDefinition> buildSequence(int totalLevels) {
+        List<LevelDefinition> sequence = new ArrayList<>();
+        sequence.add(new Level0Lobby());
+
+        List<Supplier<LevelDefinition>> pool = new ArrayList<>(LEVEL_POOL);
+        Collections.shuffle(pool, this.rnd);
+        int middleCount = Math.max(0, totalLevels - 2);
+        for(int i = 0; i < middleCount; i++) {
+            // Pool leer oder aufgebraucht: Lobby-Varianten als Fallback
+            sequence.add(i < pool.size() ? pool.get(i).get() : new Level0Lobby());
+        }
+
+        sequence.add(new LevelFinale());
+        return sequence;
+    }
+
+    public List<LevelRuntime> getLevels() {
+        return this.levels;
+    }
+
+    public Random rnd() {
+        return this.rnd;
+    }
+
+    public BackroomsPlayer playerState(Player player) {
+        return this.playerStates.get(player.getUuid());
+    }
+
+    public List<Player> playersInLevel(int index) {
+        return this.getPlayers().stream()
+            .filter(player -> player.getGameMode() == GameMode.ADVENTURE)
+            .filter(player -> {
+                BackroomsPlayer state = this.playerState(player);
+                return state != null && state.getLevelIndex() == index;
+            })
+            .toList();
+    }
+
+    public boolean isDoorOpened(int levelIndex) {
+        return this.openedDoorLevels.contains(levelIndex);
+    }
+
+    /**
+     * Erster Spieler oeffnet die Tuer: Nachricht an alle, die Keys dieses Levels
+     * zerfallen — und alle Spieler im Level bekommen automatisch einen Kompass,
+     * um schnell nachzukommen.
+     */
+    public void markDoorOpened(int levelIndex) {
+        if(!this.openedDoorLevels.add(levelIndex)) return;
+
+        this.getPlayers().forEach(player ->
+            BackroomsItems.removeMatching(player, item -> BackroomsItems.isKeyFor(item, levelIndex))
+        );
+
+        this.playersInLevel(levelIndex).forEach(player -> this.chestManager.giveCompassIfMissing(player, levelIndex));
+
+        new ChatMessage(Icon.INFO)
+            .appendTranslated("game_Backrooms#doorOpened")
+            .send(this.playersInLevel(levelIndex));
+    }
+
+    public LevelRuntime levelAt(int y) {
+        for(LevelRuntime level : this.levels) {
+            if(y >= level.getBaseY() && y < level.getBaseY() + LevelRuntime.LEVEL_HEIGHT) return level;
+        }
+        return null;
+    }
+
+    @Override
+    protected void onLoad(@NotNull CompletableFuture<Void> callback) {
+        callback.complete(null);
+    }
+
+    @Override
+    protected void onStart() {
+        // onStart laeuft in einem CompletableFuture — jede unbehandelte Exception wuerde
+        // lautlos verschluckt und ALLE Spielsysteme (Monster, Events, Sanity) blieben tot.
+        // Deshalb: alles einzeln kapseln und Fehler laut ins Log schreiben.
+        try {
+            this.getPlayers().forEach(player -> {
+                try {
+                    this.playerStates.put(player.getUuid(), new BackroomsPlayer(this.lives));
+                    player.setExp(1f);
+                    player.setFood(20);
+                    player.setFoodSaturation(0);
+                    this.createSidebar(player);
+                } catch(Exception e) {
+                    this.logger.severe("player setup failed for " + player.getUsername() + ": " + e);
+                    MinecraftServer.getExceptionManager().handleException(e);
+                }
+            });
+
+            for(LevelRuntime level : this.levels) {
+                try {
+                    level.getDefinition().populateMonsters(this, level, this.monsterDensity);
+                    this.logger.info("Backrooms level " + level.getIndex() + " ("
+                        + level.getDefinition().type() + "): " + level.getMonsters().size() + " monsters spawned");
+                } catch(Exception e) {
+                    this.logger.severe("populateMonsters failed for level " + level.getIndex() + ": " + e);
+                    MinecraftServer.getExceptionManager().handleException(e);
+                }
+            }
+
+            // Zentraler Spiel-Tick: Monster-AI (nur Level mit Spielern), No-Clip-Erkennung, Dunkelheits-Effekte
+            this.scheduler().submitTask(() -> {
+                if(!this.isRunning()) return TaskSchedule.stop();
+                this.tickCounter += 2;
+
+                for(LevelRuntime level : this.levels) {
+                    List<Player> playersInLevel = level.playersInLevel();
+                    if(playersInLevel.isEmpty()) continue;
+                    for(BackroomsMonster monster : List.copyOf(level.getMonsters())) {
+                        if(monster.isRemoved() || monster.isDead()) {
+                            monster.remove();
+                            level.getMonsters().remove(monster);
+                            continue;
+                        }
+                        // Spawn laeuft asynchron ueber loadChunk — bis dahin nicht ticken
+                        if(monster.getInstance() == null) continue;
+                        // Nur in Spielernaehe ticken: dort sind die Chunks garantiert geladen,
+                        // sonst wirft der Pathfinder auf ungeladenen Chunks NPEs
+                        boolean playerNear = playersInLevel.stream().anyMatch(player -> monster.getDistance(player) < 48);
+                        if(!playerNear) continue;
+                        try {
+                            monster.monsterTick(this.tickCounter);
+                        } catch(Exception e) {
+                            // Ein einziges kaputtes Monster darf nicht den ganzen AI-Task toeten
+                            this.logger.severe("monsterTick failed, removing monster " + monster.getEntityType() + ": " + e);
+                            MinecraftServer.getExceptionManager().handleException(e);
+                            monster.remove();
+                        }
+                    }
+                }
+
+                if(this.tickCounter % 10 == 0) {
+                    this.getPlayers().stream()
+                        .filter(player -> player.getGameMode() == GameMode.ADVENTURE)
+                        .forEach(player -> {
+                            try {
+                                this.transitionManager.onTick(player);
+                                this.applyDarkness(player);
+                            } catch(Exception e) {
+                                MinecraftServer.getExceptionManager().handleException(e);
+                            }
+                        });
+                }
+
+                return TaskSchedule.tick(2);
+            }, ExecutionType.TICK_START);
+
+            // Level-Events (Blackouts, Finale-Todeszone) + Monster-Director im Sekundentakt
+            this.scheduler().submitTask(() -> {
+                if(!this.isRunning()) return TaskSchedule.stop();
+                this.secondCounter++;
+                this.getPlayers().stream()
+                    .filter(player -> player.getGameMode() == GameMode.ADVENTURE)
+                    .forEach(player -> {
+                        try {
+                            this.tickHunger(player);
+                        } catch(Exception e) {
+                            // darf den Level-Event-Task nicht dauerhaft toeten
+                            MinecraftServer.getExceptionManager().handleException(e);
+                        }
+                    });
+                for(LevelRuntime level : this.levels) {
+                    if(level.playersInLevel().isEmpty()) continue;
+                    try {
+                        level.getDefinition().onLevelTick(this, level);
+                        if(this.secondCounter % 5 == 0) this.directMonsters(level);
+                    } catch(Exception e) {
+                        this.logger.severe("onLevelTick failed for level " + level.getIndex() + ": " + e);
+                        MinecraftServer.getExceptionManager().handleException(e);
+                    }
+                }
+                return TaskSchedule.seconds(1);
+            }, ExecutionType.TICK_END);
+
+            this.sanityManager.start();
+            this.ambienceEngine.start();
+            this.setTimeLimit(600 + this.levels.size() * 60);
+        } catch(Exception e) {
+            this.logger.severe("BackroomsGame.onStart failed: " + e);
+            MinecraftServer.getExceptionManager().handleException(e);
+        }
+    }
+
+    /**
+     * Sprinten kostet Hunger (sichtbar durch den Hunger-Effekt); unter 7 Punkten
+     * verweigert der Client das Sprinten von selbst. Der Vorrat reicht fuer rund
+     * 30 Sekunden Dauersprint; ohne Sprint regeneriert er langsam, Energy Bars
+     * fuellen ihn schnell.
+     */
+    private void tickHunger(Player player) {
+        if(player.isSprinting()) {
+            if(this.secondCounter % 2 == 0) player.setFood(Math.max(0, player.getFood() - 1));
+            player.addEffect(new Potion(PotionEffect.HUNGER, (byte) 0, 35));
+        } else if(this.secondCounter % 3 == 0) {
+            player.setFood(Math.min(20, player.getFood() + 1));
+        }
+    }
+
+    /**
+     * Monster-Director: haelt die Monsterpopulation in Spielernaehe. Roaming-Monster
+     * spawnen 6-14 Zellen (18-42 Bloecke) neben einem zufaelligen Spieler und despawnen,
+     * sobald sie von allen Spielern des Levels > 64 Bloecke entfernt sind. Fest platzierte
+     * Monster (Fallen wie Clumps, Smiler-Nester) bleiben bestehen.
+     */
+    private void directMonsters(LevelRuntime level) {
+        List<Player> players = level.playersInLevel();
+        if(players.isEmpty()) return;
+
+        for(BackroomsMonster monster : List.copyOf(level.getMonsters())) {
+            if(monster.isRemoved() || !monster.isRoaming() || monster.getInstance() == null) continue;
+            boolean anyoneNear = players.stream().anyMatch(player -> monster.getDistance(player) < 64);
+            if(!anyoneNear) {
+                monster.remove();
+                level.getMonsters().remove(monster);
+            }
+        }
+
+        long active = level.getMonsters().stream().filter(monster -> !monster.isRemoved()).count();
+        int target = this.monsterDensity + players.size();
+        if(active >= target) return;
+
+        var layout = level.getLayout();
+        for(int attempt = 0; attempt < 10 && active < target; attempt++) {
+            Player anchor = players.get(this.rnd.nextInt(players.size()));
+            int cx = layout.cellX(anchor.getPosition().x()) + this.randomOffset(6, 14);
+            int cz = layout.cellZ(anchor.getPosition().z()) + this.randomOffset(6, 14);
+            if(!layout.isWalkable(cx, cz)) continue;
+
+            // Nicht neben ein bereits vorhandenes Monster spawnen — sonst klumpen sie
+            Pos candidate = level.toPlayerPos(new int[]{cx, cz});
+            boolean crowded = level.getMonsters().stream()
+                .anyMatch(other -> !other.isRemoved() && other.getInstance() != null
+                    && other.getPosition().distance(candidate) < 12);
+            if(crowded) continue;
+
+            BackroomsMonster monster = level.getDefinition().createRoamingMonster(level, new int[]{cx, cz});
+            if(monster == null) continue;
+            monster.setRoaming(true);
+            monster.spawnAtCell(this, new int[]{cx, cz});
+            level.getMonsters().add(monster);
+            active++;
+        }
+    }
+
+    private int randomOffset(int min, int max) {
+        int magnitude = min + this.rnd.nextInt(max - min + 1);
+        return this.rnd.nextBoolean() ? magnitude : -magnitude;
+    }
+
+    /**
+     * DARKNESS-Effekt nur noch fuer Blackout-Events (ploetzlicher Lichtausfall) —
+     * dauerhaft dunkle Bereiche inkl. Lights Out verdunkelt bereits die echte
+     * Lichtberechnung; beides zusammen waere komplett blind.
+     */
+    private void applyDarkness(Player player) {
+        BackroomsPlayer state = this.playerState(player);
+        if(state == null) return;
+        LevelRuntime level = this.levels.get(state.getLevelIndex());
+        if(level.isBlackoutActive()) player.addEffect(new Potion(PotionEffect.DARKNESS, (byte) 0, 40));
+    }
+
+    @Override
+    protected void onStop() {
+        // Sidebars abrauemen — sonst nehmen die Spieler das Scoreboard mit in die Lobby
+        this.sidebars.values().forEach(sidebar ->
+            Set.copyOf(sidebar.getViewers()).forEach(sidebar::removeViewer)
+        );
+        this.sidebars.clear();
+
+        // Leben und Hunger zuruecksetzen — der Lobby-Reset des Frameworks macht das nicht
+        this.getPlayers().forEach(this::restoreVitals);
+    }
+
+    @Override
+    protected void onPlayerLeave(Player player) {
+        Sidebar sidebar = this.sidebars.remove(player.getUuid());
+        if(sidebar != null) sidebar.removeViewer(player);
+        this.restoreVitals(player);
+        super.onPlayerLeave(player);
+    }
+
+    private void restoreVitals(Player player) {
+        player.setHealth((float) player.getAttributeValue(Attribute.MAX_HEALTH));
+        player.setFood(20);
+        player.setFoodSaturation(5);
+    }
+
+    @Override
+    protected void onPlayerMove(@NotNull PlayerMoveEvent event) {
+        if(this.isBeforeBeginning) {
+            // Vor dem Start eingefroren: Umschauen erlaubt, Position bleibt fix
+            if(!event.getNewPosition().samePoint(event.getPlayer().getPosition())) {
+                event.setCancelled(true);
+            }
+            return;
+        }
+        this.transitionManager.onMove(event.getPlayer(), event.getNewPosition());
+    }
+
+    private void onUseItem(PlayerUseItemEvent event) {
+        Player player = event.getPlayer();
+        ItemStack item = event.getItemStack();
+
+        if(BackroomsItems.is(item, BackroomsItems.ALMOND_WATER)) {
+            event.setCancelled(true);
+            this.consumeOne(player, event);
+            this.sanityManager.restore(player, 0.4);
+            float maxHealth = (float) player.getAttributeValue(Attribute.MAX_HEALTH);
+            player.setHealth(Math.min(maxHealth, player.getHealth() + 4));
+            player.playSound(Sound.sound(SoundEvent.ENTITY_GENERIC_DRINK, Sound.Source.PLAYER, 1f, 1f), Sound.Emitter.self());
+        } else if(BackroomsItems.is(item, BackroomsItems.ENERGY_BAR)) {
+            event.setCancelled(true);
+            this.consumeOne(player, event);
+            player.setFood(Math.min(20, player.getFood() + 8));
+            player.playSound(Sound.sound(SoundEvent.ENTITY_PLAYER_BURP, Sound.Source.PLAYER, 1f, 1f), Sound.Emitter.self());
+        }
+    }
+
+    private void consumeOne(Player player, PlayerUseItemEvent event) {
+        ItemStack item = event.getItemStack();
+        player.setItemInHand(event.getHand(), item.withAmount(item.amount() - 1));
+    }
+
+    /** Spieler duerfen Monster schlagen (zurueckdraengen), aber keine anderen Spieler. */
+    private void onEntityAttack(EntityAttackEvent event) {
+        if(!(event.getEntity() instanceof Player attacker)) return;
+        if(!(event.getTarget() instanceof BackroomsMonster monster)) return;
+        if(this.isBeforeBeginning) return;
+
+        monster.damage(DamageType.PLAYER_ATTACK, 3);
+        var knockback = monster.getPosition().sub(attacker.getPosition()).asVec().withY(0).normalize().mul(8).withY(4);
+        monster.setVelocity(monster.getVelocity().add(knockback));
+    }
+
+    /** Hit-Delay + Abfangen toedlichen Schadens fuer die Leben-Logik. */
+    private void onEntityDamage(EntityDamageEvent event) {
+        if(!(event.getEntity() instanceof Player player)) return;
+        BackroomsPlayer state = this.playerState(player);
+        if(state == null || state.isEliminated() || state.isEscaped()) {
+            event.setCancelled(true);
+            return;
+        }
+
+        // Immunitaetsfenster wie Vanilla: ohne PvP-Lib gibt es sonst keinen Hit-Delay
+        long now = System.currentTimeMillis();
+        if(now - state.getLastDamageMillis() < 500) {
+            event.setCancelled(true);
+            return;
+        }
+        state.setLastDamageMillis(now);
+
+        if(event.getDamage().getAmount() < player.getHealth()) return;
+        event.setCancelled(true);
+        this.handleDeath(player, state);
+    }
+
+    private void handleDeath(Player player, BackroomsPlayer state) {
+        state.loseLife();
+        player.setHealth((float) player.getAttributeValue(Attribute.MAX_HEALTH));
+
+        if(state.getLives() <= 0) {
+            state.setEliminated(true);
+            player.setGameMode(GameMode.SPECTATOR);
+            new TitleMessage(Duration.ofSeconds(2)).appendTranslated("game_Backrooms#eliminated").send(player);
+            this.playSound(Sound.sound(SoundEvent.ENTITY_WITHER_SPAWN, Sound.Source.HOSTILE, 0.4f, 0.6f));
+            this.getScore().insertResult(player);
+            this.updateSidebars();
+            return;
+        }
+
+        // Respawn an zufaelliger Position im aktuellen Level; nur Schluessel bleiben im Inventar
+        this.stripInventoryExceptKeys(player);
+        LevelRuntime level = this.levels.get(state.getLevelIndex());
+        // Im Finale bekommt der Respawn eine frische persoenliche Jagd samt Vorsprung
+        if(level.getDefinition().type() == LevelType.FINALE) {
+            state.setFinaleSeconds(BackroomsPlayer.FINALE_NOT_STARTED);
+            state.setFinaleZoneX(Double.NEGATIVE_INFINITY);
+        }
+        player.teleport(level.randomSpawn());
+        player.addEffect(new Potion(PotionEffect.RESISTANCE, (byte) 4, 60));
+        player.addEffect(new Potion(PotionEffect.BLINDNESS, (byte) 0, 40));
+        player.playSound(Sound.sound(SoundEvent.ENTITY_ELDER_GUARDIAN_CURSE, Sound.Source.HOSTILE, 1f, 0.5f), Sound.Emitter.self());
+        new TitleMessage(Duration.ofSeconds(1)).appendTranslated("game_Backrooms#died").send(player);
+        this.updateSidebars();
+    }
+
+    private void stripInventoryExceptKeys(Player player) {
+        BackroomsItems.removeMatching(player, item -> !item.isAir()
+            && !BackroomsItems.is(item, BackroomsItems.LEVEL_KEY)
+            && !BackroomsItems.is(item, BackroomsItems.DOOR_COMPASS));
+    }
+
+    /** Uebergang ins naechste Level (durch Fall, Glitch-Boden oder No-Clip-Wand). */
+    public void advanceLevel(Player player, boolean teleport) {
+        BackroomsPlayer state = this.playerState(player);
+        if(state == null) return;
+        int previous = state.getLevelIndex();
+        int next = previous + 1;
+        if(next >= this.levels.size()) return;
+        state.setLevelIndex(next);
+        state.setLevelEnteredMillis(System.currentTimeMillis());
+
+        // Key und Kompass des alten Levels sind hier wertlos — weg damit
+        BackroomsItems.removeMatching(player, item -> BackroomsItems.isDoorItemFor(item, previous));
+
+        LevelRuntime level = this.levels.get(next);
+        // Ins Finale steigt man immer am Korridor-Anfang ein — sonst wuerde der
+        // Fall-Schacht mitten auf der Rennstrecke enden
+        boolean isFinale = level.getDefinition().type() == LevelType.FINALE;
+        if(teleport || isFinale) player.teleport(level.randomSpawn());
+
+        // Ist die Tuer dieses Levels schon offen, gibt es den Kompass zum Nachkommen
+        if(this.isDoorOpened(next)) this.chestManager.giveCompassIfMissing(player, next);
+
+        // Sichtbarkeitsregeln werden nur beim Aufruf ausgewertet — fuer den neuen
+        // Spieler im Level muessen alle Monster ihre Viewer neu berechnen, sonst
+        // bleiben sie fuer ihn unsichtbar (greifen aber serverseitig an)
+        level.getMonsters().forEach(monster -> {
+            if(!monster.isRemoved()) monster.updateViewableRule();
+        });
+
+        player.addEffect(new Potion(PotionEffect.BLINDNESS, (byte) 0, 40));
+        player.playSound(Sound.sound(SoundEvent.BLOCK_PORTAL_TRAVEL, Sound.Source.AMBIENT, 0.4f, 0.5f), Sound.Emitter.self());
+        new TitleMessage(Duration.ofSeconds(2))
+            .appendTranslated(level.getDefinition().type().translationKey())
+            .send(player);
+        this.updateSidebars();
+    }
+
+    /** Der Spieler hat das Finale durchquert und ist entkommen. */
+    public void escape(Player player) {
+        BackroomsPlayer state = this.playerState(player);
+        if(state == null || state.isEscaped()) return;
+        state.setEscaped(true);
+
+        player.setGameMode(GameMode.SPECTATOR);
+        new TitleMessage(Duration.ofSeconds(3)).appendTranslated("game_Backrooms#escaped").send(player);
+        this.playSound(Sound.sound(SoundEvent.UI_TOAST_CHALLENGE_COMPLETE, Sound.Source.MASTER, 0.8f, 1f));
+        this.getScore().insertResult(player, 1);
+        this.updateSidebars();
+    }
+
+    private void createSidebar(Player player) {
+        Sidebar sidebar = new Sidebar(Component.text("Backrooms"));
+        sidebar.createLine(new Sidebar.ScoreboardLine("level", this.sidebarLevelLine(player), 2));
+        sidebar.createLine(new Sidebar.ScoreboardLine("lives", this.sidebarLivesLine(player), 1));
+        sidebar.createLine(new Sidebar.ScoreboardLine("players", this.sidebarPlayersLine(), 0));
+        sidebar.addViewer(player);
+        this.sidebars.put(player.getUuid(), sidebar);
+    }
+
+    private Component sidebarLevelLine(Player player) {
+        BackroomsPlayer state = this.playerState(player);
+        int index = state == null ? 0 : state.getLevelIndex();
+        return TranslatedComponent.byId(this.levels.get(index).getDefinition().type().translationKey()).getAssembled(player);
+    }
+
+    private Component sidebarLivesLine(Player player) {
+        BackroomsPlayer state = this.playerState(player);
+        return Component.text("❤ " + (state == null ? this.lives : Math.max(0, state.getLives())));
+    }
+
+    private Component sidebarPlayersLine() {
+        long active = this.playerStates.values().stream()
+            .filter(state -> !state.isEliminated() && !state.isEscaped())
+            .count();
+        return Component.text("☠ " + active);
+    }
+
+    private void updateSidebars() {
+        this.getPlayers().forEach(player -> {
+            Sidebar sidebar = this.sidebars.get(player.getUuid());
+            if(sidebar == null) return;
+            sidebar.updateLineContent("level", this.sidebarLevelLine(player));
+            sidebar.updateLineContent("lives", this.sidebarLivesLine(player));
+            sidebar.updateLineContent("players", this.sidebarPlayersLine());
+        });
+    }
+
+    @Override
+    public Pos getSpawn() {
+        // Jeder Spieler bekommt einen zufaelligen, weit gestreuten Spawn in Level 0
+        return this.levels.getFirst().randomSpawn();
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/BackroomsGenerator.java

@@ -1,86 +0,0 @@
-package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms;
-
-import net.minestom.server.instance.block.Block;
-import net.minestom.server.instance.generator.GenerationUnit;
-import net.minestom.server.instance.generator.UnitModifier;
-import java.util.concurrent.ThreadLocalRandom;
-
-public class BackroomsGenerator {
-    public void generateRoom(GenerationUnit unit, int y) {
-        var modifier = unit.modifier();
-        var start = unit.absoluteStart();
-        var yPos = start.blockY() + y;
-
-        for (int x = 0; x < unit.size().blockX(); x++) {
-            for (int z = 0; z < unit.size().blockZ(); z++) {
-                var xPos = start.blockX() + x;
-                var zPos = start.blockZ() + z;
-
-                modifier.setBlock(xPos, yPos - 1, zPos, Block.BEDROCK);
-                modifier.setBlock(xPos, yPos + 5, zPos, Block.BEDROCK);
-
-                modifier.setBlock(xPos, yPos, zPos, Block.LIGHT_GRAY_WOOL);
-                modifier.setBlock(xPos, yPos + 4, zPos, Block.SMOOTH_STONE_SLAB);
-
-                // idk man... dont ask about this
-                if (
-                        (x - 2) % 4 == 0 && (
-                                ((z - 2) % 8 == 0) ||
-                                        ((z - 2) % 8 == 1) ||
-                                        ((z - 2) % 8 == 3) ||
-                                        ((z - 2) % 8 == 4)
-                        )
-                ) {
-                    modifier.setBlock(xPos, yPos + 4, zPos, Block.SEA_LANTERN);
-                }
-            }
-        }
-
-        generateWalls(modifier, start.blockX() + 0, yPos + 1, start.blockZ() + 0);
-        generateWalls(modifier, start.blockX() + 8, yPos + 1, start.blockZ() + 0);
-        generateWalls(modifier, start.blockX() + 0, yPos + 1, start.blockZ() + 8);
-        generateWalls(modifier, start.blockX() + 8, yPos + 1, start.blockZ() + 8);
-    }
-
-    private void generateWalls(UnitModifier modifier, int xPos, int yPos, int zPos) {
-        generatePillar(modifier, xPos, yPos, zPos, Block.CHISELED_SANDSTONE);
-
-        var random = ThreadLocalRandom.current();
-
-        var wall1 = random.nextInt(4) != 0;
-        var wall2 = random.nextInt(4) != 0;
-        var door1 = random.nextInt(2) != 0;
-        var door2 = random.nextInt(2) != 0;
-
-        var door1pos = random.nextInt(2, 6);
-        var door2pos = random.nextInt(2, 6);
-
-        if (wall1) {
-            for (int x = xPos; x < xPos + 8; x++) {
-                generatePillar(modifier, x, yPos, zPos, Block.SMOOTH_SANDSTONE);
-            }
-        }
-
-        if (wall2) {
-            for (int z = zPos; z < zPos + 8; z++) {
-                generatePillar(modifier, xPos, yPos, z, Block.SMOOTH_SANDSTONE);
-            }
-        }
-
-        if (door1 && wall1) {
-            generatePillar(modifier, xPos + door1pos, yPos, zPos, Block.AIR);
-            generatePillar(modifier, xPos + door1pos + 1, yPos, zPos, Block.AIR);
-        }
-
-        if (door2 && wall2) {
-            generatePillar(modifier, xPos, yPos, zPos + door2pos, Block.AIR);
-            generatePillar(modifier, xPos, yPos, zPos + door2pos + 1, Block.AIR);
-        }
-    }
-
-    private void generatePillar(UnitModifier modifier, int xPos, int yPos, int zPos, Block material) {
-        for (int y = yPos; y < yPos + 3; y++) {
-            modifier.setBlock(xPos, y, zPos, material);
-        }
-    }
-}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/BackroomsPlayer.java

@@ -0,0 +1,96 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms;
+
+/**
+ * Laufzeit-Zustand eines Spielers: Leben, aktuelles Level, Sanity und Fortschritt.
+ */
+public class BackroomsPlayer {
+    private int lives;
+    private int levelIndex = 0;
+    private double sanity = 1.0;
+    private boolean escaped = false;
+    private boolean eliminated = false;
+    private long lastDamageMillis = 0;
+    private long levelEnteredMillis = System.currentTimeMillis();
+
+    // Persoenlicher Finale-Zustand: jeder Spieler hat seine eigene Verfolgungsjagd
+    public static final int FINALE_NOT_STARTED = Integer.MIN_VALUE;
+    private int finaleSeconds = FINALE_NOT_STARTED;
+    private double finaleZoneX = Double.NEGATIVE_INFINITY;
+
+    public BackroomsPlayer(int lives) {
+        this.lives = lives;
+    }
+
+    public int getLives() {
+        return this.lives;
+    }
+
+    public void loseLife() {
+        this.lives--;
+    }
+
+    public int getLevelIndex() {
+        return this.levelIndex;
+    }
+
+    public void setLevelIndex(int levelIndex) {
+        this.levelIndex = levelIndex;
+    }
+
+    public double getSanity() {
+        return this.sanity;
+    }
+
+    public void setSanity(double sanity) {
+        this.sanity = sanity;
+    }
+
+    public boolean isEscaped() {
+        return this.escaped;
+    }
+
+    public void setEscaped(boolean escaped) {
+        this.escaped = escaped;
+    }
+
+    public boolean isEliminated() {
+        return this.eliminated;
+    }
+
+    public void setEliminated(boolean eliminated) {
+        this.eliminated = eliminated;
+    }
+
+    public int getFinaleSeconds() {
+        return this.finaleSeconds;
+    }
+
+    public void setFinaleSeconds(int finaleSeconds) {
+        this.finaleSeconds = finaleSeconds;
+    }
+
+    public double getFinaleZoneX() {
+        return this.finaleZoneX;
+    }
+
+    public void setFinaleZoneX(double finaleZoneX) {
+        this.finaleZoneX = finaleZoneX;
+    }
+
+    public long getLevelEnteredMillis() {
+        return this.levelEnteredMillis;
+    }
+
+    public void setLevelEnteredMillis(long levelEnteredMillis) {
+        this.levelEnteredMillis = levelEnteredMillis;
+    }
+
+    public long getLastDamageMillis() {
+        return this.lastDamageMillis;
+    }
+
+    public void setLastDamageMillis(long lastDamageMillis) {
+        this.lastDamageMillis = lastDamageMillis;
+    }
+
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/BackroomsScore.java

@@ -0,0 +1,58 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms;
+
+import eu.mhsl.minenet.minigames.message.TranslatableMessage;
+import eu.mhsl.minenet.minigames.message.type.TitleMessage;
+import eu.mhsl.minenet.minigames.score.Score;
+import net.minestom.server.entity.Player;
+
+import java.time.Duration;
+import java.util.Set;
+
+/**
+ * Kombi-Wertung: Entkommene stehen in Flucht-Reihenfolge vorn; danach folgen die
+ * Gestorbenen, spaeterer Tod = besserer Platz. Der letzte Ueberlebende (via
+ * insertRemainingPlayers) landet direkt hinter den Entkommenen — gewinnt also,
+ * wenn niemand entkommen ist.
+ */
+public class BackroomsScore extends Score {
+    private int escapedCount = 0;
+
+    /** Entkommen (Punkte-Pfad) */
+    @Override
+    protected void insertResultImplementation(Set<Player> p, int points) {
+        this.getScores().add(this.escapedCount, p);
+        this.escapedCount++;
+    }
+
+    /** Tod bzw. verbliebene Spieler bei Spielende */
+    @Override
+    protected void insertResultImplementation(Set<Player> p) {
+        this.getScores().add(this.escapedCount, p);
+    }
+
+    /**
+     * Wie Score.checkGameEnd, aber mit Untergrenze von einem echten Ergebnis:
+     * mit ignoreLastPlayers=1 und nur einem Spieler wuerde das Spiel sonst
+     * sofort nach dem Start enden (0 &gt;= 1-1).
+     */
+    @Override
+    protected void checkGameEnd() {
+        if(this.isClosed()) return;
+        if(!this.instance.isRunning()) return;
+        if(this.instance.getPlayers().isEmpty()) return;
+
+        int required = Math.max(1, this.instance.getPlayers().size() - this.getIgnoreLastPlayers());
+        if(this.resultCount() >= required) {
+            if(this.getIgnoreLastPlayers() > 0) {
+                this.insertRemainingPlayers(this.instance.getPlayers());
+            } else {
+                this.setDone();
+            }
+        }
+    }
+
+    @Override
+    protected TranslatableMessage scoreMessage() {
+        return new TitleMessage(Duration.ofMillis(1000), Duration.ofSeconds(1)).appendTranslated("score#finish");
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/BackroomsSmokeTest.java

@@ -0,0 +1,43 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms;
+
+import eu.mhsl.minenet.minigames.instance.Dimension;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import net.minestom.server.Auth;
+import net.minestom.server.MinecraftServer;
+
+/**
+ * Wegwerf-Smoke-Test (headless, ohne Client): baut ein Spiel, spawnt die Monster
+ * und prueft, ob sie tatsaechlich in der Instanz landen. Wird nach der Diagnose geloescht.
+ */
+public class BackroomsSmokeTest {
+    public static void main(String[] args) throws Exception {
+        MinecraftServer server = MinecraftServer.init(new Auth.Offline());
+        Dimension.values();
+        server.start("127.0.0.1", 25599);
+
+        BackroomsGame game = new BackroomsGame(4, 3, 2, 0, false, 8);
+
+        for(LevelRuntime level : game.getLevels()) {
+            System.out.println("[SMOKE] Level " + level.getIndex() + " = " + level.getDefinition().type()
+                + ", baseY=" + level.getBaseY()
+                + ", cells=" + level.getLayout().getCells()
+                + ", spawns=" + level.getLayout().getSpawnCells().size()
+                + ", chests=" + level.getLayout().getChestCells().size()
+                + ", exit=" + java.util.Arrays.toString(level.getLayout().getExitCell()));
+            level.getDefinition().populateMonsters(game, level, 2);
+        }
+
+        Thread.sleep(8000);
+
+        for(LevelRuntime level : game.getLevels()) {
+            long inInstance = level.getMonsters().stream().filter(m -> m.getInstance() != null).count();
+            System.out.println("[SMOKE] Level " + level.getIndex() + " (" + level.getDefinition().type() + "): "
+                + level.getMonsters().size() + " Monster erzeugt, " + inInstance + " in der Instanz");
+            level.getMonsters().forEach(m -> System.out.println("[SMOKE]   - " + m.getEntityType()
+                + " @ " + m.getPosition() + " instance=" + (m.getInstance() != null)));
+        }
+
+        System.out.println("[SMOKE] done");
+        System.exit(0);
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/ClumpTriggerTest.java

@@ -0,0 +1,96 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms;
+
+import eu.mhsl.minenet.minigames.instance.Dimension;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.BackroomsMonster;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Clump;
+import net.minestom.server.Auth;
+import net.minestom.server.MinecraftServer;
+import net.minestom.server.entity.GameMode;
+import net.minestom.server.entity.Player;
+import net.minestom.server.network.packet.server.SendablePacket;
+import net.minestom.server.network.player.GameProfile;
+import net.minestom.server.network.player.PlayerConnection;
+
+import java.lang.reflect.Field;
+import java.net.InetSocketAddress;
+import java.net.SocketAddress;
+import java.util.UUID;
+
+/**
+ * Wegwerf-Repro (headless): spawnt einen Clump, stellt einen Dummy-Spieler daneben
+ * und treibt monsterTick von Hand — prueft, ob der Jumpscare-Trigger feuert.
+ */
+public class ClumpTriggerTest {
+    public static void main(String[] args) throws Exception {
+        MinecraftServer server = MinecraftServer.init(new Auth.Offline());
+        Dimension.values();
+        server.start("127.0.0.1", 25598);
+
+        BackroomsGame game = new BackroomsGame(4, 3, 2, 0, false, 8);
+        LevelRuntime level = game.getLevels().getFirst();
+
+        PlayerConnection connection = new PlayerConnection() {
+            @Override
+            public void sendPacket(SendablePacket packet) {
+            }
+
+            @Override
+            public SocketAddress getRemoteAddress() {
+                return new InetSocketAddress("127.0.0.1", 0);
+            }
+        };
+        Player player = new Player(connection, new GameProfile(UUID.randomUUID(), "Testificate"));
+        int[] spawnCell = level.getLayout().getSpawnCells().getFirst();
+        player.setInstance(game, level.toPlayerPos(spawnCell)).join();
+        player.setGameMode(GameMode.ADVENTURE);
+        System.out.println("[REPRO] player instance=" + (player.getInstance() != null) + " gamemode=" + player.getGameMode());
+
+        game.onStart();
+        System.out.println("[REPRO] playerState=" + game.playerState(player));
+
+        Clump clump = new Clump(level) {
+            @Override
+            public void remove() {
+                new Exception("[REPRO] remove() aufgerufen, dead=" + this.isDead() + " health=" + this.getHealth()).printStackTrace(System.out);
+                super.remove();
+            }
+        };
+        try {
+            var position = level.toPlayerPos(spawnCell);
+            for(int dx = -1; dx <= 1; dx++) {
+                for(int dz = -1; dz <= 1; dz++) {
+                    game.loadChunk(position.chunkX() + dx, position.chunkZ() + dz).join();
+                }
+            }
+            System.out.println("[REPRO] chunks loaded, calling setInstance to " + position);
+            clump.setInstance(game, position).join();
+        } catch(Throwable t) {
+            System.out.println("[REPRO] spawn failed:");
+            t.printStackTrace(System.out);
+        }
+        Thread.sleep(1000);
+        System.out.println("[REPRO] clump instance=" + (clump.getInstance() != null) + " pos=" + clump.getPosition() + " removed=" + clump.isRemoved());
+
+        player.teleport(clump.getPosition().add(1.2, 0, 0)).join();
+        Thread.sleep(500);
+        System.out.println("[REPRO] distance=" + clump.getDistance(player));
+        System.out.println("[REPRO] playersInLevel(0)=" + game.playersInLevel(0).size());
+
+        Field stateField = BackroomsMonster.class.getDeclaredField("state");
+        stateField.setAccessible(true);
+        for(long t = 2; t <= 160; t += 2) {
+            clump.monsterTick(t);
+            if(t % 20 == 0) {
+                System.out.println("[REPRO] t=" + t + " state=" + stateField.get(clump)
+                    + " removed=" + clump.isRemoved()
+                    + " velocity=" + clump.getVelocity()
+                    + " playerHealth=" + player.getHealth());
+            }
+            Thread.sleep(50);
+        }
+
+        System.out.println("[REPRO] done");
+        System.exit(0);
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/ambience/AmbienceEngine.java

@@ -0,0 +1,70 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import net.kyori.adventure.sound.Sound;
+import net.minestom.server.entity.Player;
+import net.minestom.server.sound.SoundEvent;
+import net.minestom.server.timer.ExecutionType;
+import net.minestom.server.timer.TaskSchedule;
+
+import java.util.Random;
+
+/**
+ * Spielt pro Level den Ambience-Loop und seltene positionale One-Shots,
+ * dazu global einen sehr leisen End-Soundtrack. Level ohne Spieler bleiben stumm.
+ */
+public class AmbienceEngine {
+    private final BackroomsGame game;
+    private final Random rnd = new Random();
+    private int secondCounter = 0;
+
+    public AmbienceEngine(BackroomsGame game) {
+        this.game = game;
+    }
+
+    public void start() {
+        this.game.scheduler().submitTask(() -> {
+            if(!this.game.isRunning()) return TaskSchedule.stop();
+            try {
+                this.tick();
+            } catch(Exception e) {
+                // Ein Fehler darf den Ambience-Task nicht dauerhaft toeten
+                net.minestom.server.MinecraftServer.getExceptionManager().handleException(e);
+            }
+            return TaskSchedule.seconds(1);
+        }, ExecutionType.TICK_END);
+    }
+
+    private void tick() {
+        this.secondCounter++;
+
+            for(LevelRuntime level : this.game.getLevels()) {
+                var players = level.playersInLevel();
+                if(players.isEmpty()) continue;
+
+                AmbienceProfile profile = level.getDefinition().ambience();
+                if(this.secondCounter % profile.loopPeriodSeconds() == 0) {
+                    players.forEach(player -> player.playSound(
+                        Sound.sound(profile.loop(), Sound.Source.AMBIENT, profile.loopVolume(), profile.loopPitch()),
+                        Sound.Emitter.self()
+                    ));
+                }
+
+                for(Player player : players) {
+                    if(this.rnd.nextDouble() >= profile.oneShotChancePerSecond()) continue;
+                    if(profile.oneShots().isEmpty()) continue;
+                    SoundEvent oneShot = profile.oneShots().get(this.rnd.nextInt(profile.oneShots().size()));
+                    Jumpscare.playBehind(player, oneShot, Sound.Source.AMBIENT, 5, 0.6f, 0.8f);
+                }
+            }
+
+            // Der End-Soundtrack als kaum hoerbare, unheimliche Untermalung
+            if(this.secondCounter % 180 == 1) {
+                this.game.getPlayers().forEach(player -> player.playSound(
+                    Sound.sound(SoundEvent.MUSIC_END, Sound.Source.MUSIC, 0.05f, 1f),
+                    Sound.Emitter.self()
+                ));
+            }
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/ambience/AmbienceProfile.java

@@ -0,0 +1,20 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience;
+
+import net.minestom.server.sound.SoundEvent;
+
+import java.util.List;
+
+/**
+ * Klangprofil eines Levels: wiederkehrender Basis-Loop plus seltene Zufalls-One-Shots
+ * (entfernte Schritte, Knarren, Fluestern ...), die die AmbienceEngine positional
+ * hinter den Spielern abspielt.
+ */
+public record AmbienceProfile(
+    SoundEvent loop,
+    float loopVolume,
+    float loopPitch,
+    int loopPeriodSeconds,
+    List<SoundEvent> oneShots,
+    double oneShotChancePerSecond
+) {
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/ambience/Jumpscare.java

@@ -0,0 +1,81 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience;
+
+import net.kyori.adventure.sound.Sound;
+import net.minestom.server.MinecraftServer;
+import net.minestom.server.coordinate.Pos;
+import net.minestom.server.coordinate.Vec;
+import net.minestom.server.entity.EntityType;
+import net.minestom.server.entity.EquipmentSlot;
+import net.minestom.server.entity.LivingEntity;
+import net.minestom.server.entity.Player;
+import net.minestom.server.instance.Instance;
+import net.minestom.server.item.ItemStack;
+import net.minestom.server.item.Material;
+import net.minestom.server.network.packet.server.play.ChangeGameStatePacket;
+import net.minestom.server.sound.SoundEvent;
+import net.minestom.server.timer.TaskSchedule;
+
+import java.util.List;
+import java.util.Random;
+
+/**
+ * Jumpscare-Rezepte. Alle Methoden sind bewusst kurz und komponierbar:
+ * sound() nur akustisch, visual() mit kurzem Schreckbild, fake() als Sanity-Halluzination.
+ */
+public final class Jumpscare {
+    private static final List<SoundEvent> SCARE_SOUNDS = List.of(
+        SoundEvent.ENTITY_ENDERMAN_SCREAM,
+        SoundEvent.ENTITY_CAT_HISS,
+        SoundEvent.ENTITY_ELDER_GUARDIAN_CURSE,
+        SoundEvent.AMBIENT_CAVE
+    );
+
+    private Jumpscare() {
+    }
+
+    /** Positionsgebundener Sound schraeg hinter dem Spieler. */
+    public static void playBehind(Player player, SoundEvent event, Sound.Source source, double distance, float volume, float pitch) {
+        Pos behind = player.getPosition().sub(player.getPosition().direction().mul(distance));
+        player.playSound(Sound.sound(event, source, volume, pitch), behind.x(), behind.y(), behind.z());
+    }
+
+    /** Lauter Schreckenssound direkt hinter dem Spieler. */
+    public static void sound(Player player, Random rnd) {
+        SoundEvent event = SCARE_SOUNDS.get(rnd.nextInt(SCARE_SOUNDS.size()));
+        playBehind(player, event, Sound.Source.HOSTILE, 3, 1.5f, 0.5f + rnd.nextFloat() * 0.2f);
+    }
+
+    /**
+     * Schreckbild: der Elder-Guardian-Geist blitzt als Fullscreen-Overlay auf,
+     * gleichzeitig erscheint fuer einen Wimpernschlag ein Schaedel direkt vor dem
+     * Gesicht — Doppelschlag aus Overlay und physischem Schreckbild.
+     */
+    public static void visual(Player player, Instance instance) {
+        player.sendPacket(new ChangeGameStatePacket(ChangeGameStatePacket.Reason.PLAYER_ELDER_GUARDIAN_MOB_APPEARANCE, 0f));
+
+        Vec direction = player.getPosition().direction();
+        Pos position = player.getPosition()
+            .add(direction.mul(1.6))
+            .add(0, player.getEyeHeight() - 1.4, 0)
+            .withYaw(player.getPosition().yaw() + 180)
+            .withPitch(0);
+
+        LivingEntity scare = new LivingEntity(EntityType.ARMOR_STAND);
+        scare.updateViewableRule(viewer -> viewer.getUuid().equals(player.getUuid()));
+        scare.setInvisible(true);
+        scare.setNoGravity(true);
+        scare.setEquipment(EquipmentSlot.HELMET, ItemStack.of(Material.WITHER_SKELETON_SKULL));
+        scare.setInstance(instance, position);
+        MinecraftServer.getSchedulerManager().scheduleTask(scare::remove, TaskSchedule.tick(8), TaskSchedule.stop());
+
+        player.playSound(Sound.sound(SoundEvent.ENTITY_ELDER_GUARDIAN_CURSE, Sound.Source.HOSTILE, 1.8f, 0.6f), player.getPosition());
+        player.playSound(Sound.sound(SoundEvent.ENTITY_ENDERMAN_SCREAM, Sound.Source.HOSTILE, 1.2f, 0.5f), player.getPosition());
+    }
+
+
+    /** Harmlose Halluzination bei niedriger Sanity: nur ein Geraeusch, keine Gefahr. */
+    public static void fake(Player player, Random rnd) {
+        SoundEvent event = rnd.nextBoolean() ? SoundEvent.BLOCK_WOODEN_DOOR_CLOSE : SoundEvent.BLOCK_STONE_STEP;
+        playBehind(player, event, Sound.Source.AMBIENT, 4, 0.8f, 0.9f);
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/door/DoorManager.java

@@ -0,0 +1,72 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.door;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.item.BackroomsItems;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import net.kyori.adventure.sound.Sound;
+import net.minestom.server.entity.Player;
+import net.minestom.server.event.player.PlayerBlockInteractEvent;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.item.ItemStack;
+import net.minestom.server.sound.SoundEvent;
+
+/**
+ * Verschlossene Exit-Kammern: die DOOR-Zelle ist mit IRON_BARS gefuellt und
+ * oeffnet sich nur mit dem Level Key des jeweiligen Levels.
+ */
+public class DoorManager {
+    private final BackroomsGame game;
+
+    public DoorManager(BackroomsGame game) {
+        this.game = game;
+    }
+
+    public void onInteract(PlayerBlockInteractEvent event) {
+        if(!event.getBlock().compare(Block.IRON_DOOR)) return;
+
+        Player player = event.getPlayer();
+        LevelRuntime level = this.game.levelAt(event.getBlockPosition().blockY());
+        if(level == null) return;
+
+        event.setCancelled(true);
+        event.setBlockingItemUse(true);
+
+        ItemStack held = player.getItemInHand(event.getHand());
+        if(!BackroomsItems.isKeyFor(held, level.getIndex())) {
+            player.playSound(Sound.sound(SoundEvent.BLOCK_CHEST_LOCKED, Sound.Source.BLOCK, 1f, 0.7f), player.getPosition());
+            return;
+        }
+
+        // Einzeltuer-Semantik (Finale-Duell-Kammern): Key oeffnet nur DIESE Tuer und wird verbraucht
+        if(level.getDefinition().opensSingleDoors()) {
+            player.setItemInHand(event.getHand(), held.withAmount(held.amount() - 1));
+            this.openSingleDoor(level, event.getBlockPosition().blockX(), event.getBlockPosition().blockZ());
+            player.playSound(Sound.sound(SoundEvent.BLOCK_IRON_DOOR_OPEN, Sound.Source.BLOCK, 1f, 0.6f), player.getPosition());
+            return;
+        }
+
+        this.openDoor(level);
+        this.game.markDoorOpened(level.getIndex());
+        player.playSound(Sound.sound(SoundEvent.BLOCK_IRON_DOOR_OPEN, Sound.Source.BLOCK, 1f, 0.6f), player.getPosition());
+    }
+
+    /** Oeffnet nur die Tuer an der angeklickten Zelle. */
+    private void openSingleDoor(LevelRuntime level, int blockX, int blockZ) {
+        LevelLayout layout = level.getLayout();
+        int cx = layout.cellX(blockX);
+        int cz = layout.cellZ(blockZ);
+        if(layout.cellAt(cx, cz) != LevelLayout.Cell.DOOR) return;
+        int doorX = layout.worldX(cx) + 1;
+        int doorZ = layout.worldZ(cz) + 1;
+        this.game.setBlock(doorX, level.getBaseY() + 2, doorZ, Block.AIR);
+        this.game.setBlock(doorX, level.getBaseY() + 3, doorZ, Block.AIR);
+    }
+
+    /** Oeffnet die Exit-Kammer-Tuer des Levels (Position kennt das Layout). */
+    private void openDoor(LevelRuntime level) {
+        int[] door = level.getLayout().getDoorCell();
+        if(door == null) return;
+        this.openSingleDoor(level, level.getLayout().worldX(door[0]) + 1, level.getLayout().worldZ(door[1]) + 1);
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/generator/BackroomsChunkGenerator.java

@@ -0,0 +1,335 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.generator;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout.Cell;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelPalette;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.TransitionType;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.generator.GenerationUnit;
+import net.minestom.server.instance.generator.Generator;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Random;
+import java.util.Set;
+
+/**
+ * Rendert die vorab berechneten Level-Layouts als vertikal gestapelte Ebenen.
+ * Reines Lookup: saemtliche Struktur (Maze, Exits, Kisten, Licht) steht im LevelLayout.
+ *
+ * Aufbau je Level (baseY b): b Bedrock, b+1 Boden, b+2..b+1+roomHeight Raum,
+ * b+2+roomHeight Decke, b+3+roomHeight Bedrock. Exit-Schaechte (HOLE/LADDER) durchbrechen
+ * Boden und die Decke des Levels darunter.
+ */
+public class BackroomsChunkGenerator implements Generator {
+    private final List<LevelRuntime> levels;
+    /** O(1)-Lookups pro Level (statt Listen-Scans pro Blocksaeule) */
+    private final List<Set<Long>> lightKeys = new ArrayList<>();
+    private final List<Set<Long>> chestKeys = new ArrayList<>();
+
+    /** wiederverwendetes Random pro Generator-Thread (Seed pro Saeule gesetzt) */
+    private static final ThreadLocal<Random> COLUMN_RANDOM = ThreadLocal.withInitial(Random::new);
+
+    public BackroomsChunkGenerator(List<LevelRuntime> levels) {
+        this.levels = levels;
+        for(LevelRuntime level : levels) {
+            Set<Long> lights = new HashSet<>();
+            level.getLayout().getLightCells().forEach(cell -> lights.add(cellKey(cell[0], cell[1])));
+            this.lightKeys.add(lights);
+
+            Set<Long> chests = new HashSet<>();
+            level.getLayout().getChestCells().forEach(cell -> chests.add(cellKey(cell[0], cell[1])));
+            int[] keyChest = level.getLayout().getKeyChestCell();
+            if(keyChest != null) chests.add(cellKey(keyChest[0], keyChest[1]));
+            this.chestKeys.add(chests);
+        }
+    }
+
+    private static long cellKey(int cx, int cz) {
+        return ((long) cx << 32) | (cz & 0xFFFFFFFFL);
+    }
+
+    @Override
+    public void generate(@NotNull GenerationUnit unit) {
+        Point start = unit.absoluteStart();
+
+        // Massive Zwischenschichten als ein fillHeight pro Level statt ~17 setBlock
+        // pro Saeule; Schacht-Saeulen werden in generateColumn wieder freigeraeumt
+        for(int levelIndex = 1; levelIndex < this.levels.size(); levelIndex++) {
+            LevelRuntime level = this.levels.get(levelIndex);
+            int bandStart = level.getBaseY() + 2 + level.getDefinition().palette().roomHeight() + 2;
+            unit.modifier().fillHeight(bandStart, level.getBaseY() + LevelRuntime.LEVEL_HEIGHT, Block.BEDROCK);
+        }
+
+        for(int x = 0; x < unit.size().blockX(); x++) {
+            for(int z = 0; z < unit.size().blockZ(); z++) {
+                int worldX = start.blockX() + x;
+                int worldZ = start.blockZ() + z;
+
+                for(int levelIndex = 0; levelIndex < this.levels.size(); levelIndex++) {
+                    this.generateColumn(unit, this.levels.get(levelIndex), levelIndex, worldX, worldZ);
+                }
+            }
+        }
+    }
+
+    private void generateColumn(GenerationUnit unit, LevelRuntime level, int levelIndex, int worldX, int worldZ) {
+        LevelLayout layout = level.getLayout();
+        int cx = layout.cellX(worldX);
+        int cz = layout.cellZ(worldZ);
+        if(!layout.inBounds(cx, cz) || !layout.inGenerationBounds(cx, cz)) return;
+
+        LevelPalette palette = level.getDefinition().palette();
+        int baseY = level.getBaseY();
+        int ceilingY = baseY + 2 + palette.roomHeight();
+        Cell cell = layout.cellAt(cx, cz);
+        TransitionType transition = level.getDefinition().transitionType();
+
+        // deterministische Variation pro Saeule (fleckige Boeden/Waende)
+        Random rnd = COLUMN_RANDOM.get();
+        rnd.setSeed(worldX * 341873128712L + worldZ * 132897987541L + levelIndex);
+
+        boolean openShaft = cell == Cell.EXIT && (transition == TransitionType.HOLE || transition == TransitionType.LADDER);
+
+        // Boden + Fundament
+        if(openShaft) {
+            // Schacht: kein Boden, Loch faellt bis ins Level darunter
+        } else if(cell == Cell.WATER) {
+            this.set(unit, worldX, baseY, worldZ, Block.BEDROCK);
+            this.set(unit, worldX, baseY + 1, worldZ, Block.WATER);
+        } else if(cell == Cell.DEEP_WATER) {
+            // doppelt tiefes Becken: zwei Wasserschichten
+            this.set(unit, worldX, baseY, worldZ, Block.BEDROCK);
+            this.set(unit, worldX, baseY + 1, worldZ, Block.WATER);
+            this.set(unit, worldX, baseY + 2, worldZ, Block.WATER);
+        } else if(cell == Cell.LEAK) {
+            // Undichtigkeit: Bodenpfuetze, Wassersaeule in der Zellenmitte bis zur Leitung
+            this.set(unit, worldX, baseY, worldZ, Block.BEDROCK);
+            this.set(unit, worldX, baseY + 1, worldZ, Block.WATER);
+        } else if(cell == Cell.EXIT && transition == TransitionType.GLITCH_FLOOR) {
+            this.set(unit, worldX, baseY, worldZ, Block.BEDROCK);
+            this.set(unit, worldX, baseY + 1, worldZ, (worldX + worldZ) % 2 == 0 ? Block.BLACK_CONCRETE : Block.PURPLE_CONCRETE);
+        } else if(this.isEscapeGoal(layout, cx, transition)) {
+            // Sichtbare Ziel-Zone am Ende des Finale-Korridors: leuchtender Boden
+            this.set(unit, worldX, baseY, worldZ, Block.BEDROCK);
+            this.set(unit, worldX, baseY + 1, worldZ, Block.GLOWSTONE);
+        } else {
+            this.set(unit, worldX, baseY, worldZ, Block.BEDROCK);
+            Block floor = this.isDoorStain(layout, cx, cz, rnd)
+                ? this.stainBlock(rnd)
+                : palette.floorAt(worldX, worldZ, rnd);
+            this.set(unit, worldX, baseY + 1, worldZ, floor);
+        }
+
+        // Loot-Kisten (Barrels) in der Zellenmitte
+        boolean isChestColumn = !openShaft && this.isCenterColumn(worldX, worldZ) && this.isChestCell(levelIndex, cx, cz);
+        if(isChestColumn) {
+            this.set(unit, worldX, baseY + 2, worldZ, Block.BARREL);
+        }
+
+        // Deko: seltene Boden-Details (Spinnweben, Kuchen, Sculk ...) und Decken-Details (Ketten, Lampen)
+        if(cell == Cell.FLOOR && !isChestColumn) {
+            if(!palette.floorDeco().isEmpty() && rnd.nextDouble() < palette.floorDecoChance()) {
+                this.set(unit, worldX, baseY + 2, worldZ, palette.rndFloorDeco(rnd));
+            }
+            if(!palette.ceilingDeco().isEmpty() && rnd.nextDouble() < palette.ceilingDecoChance()) {
+                this.set(unit, worldX, ceilingY - 1, worldZ, palette.rndCeilingDeco(rnd));
+            }
+        }
+
+        // Raumvolumen
+        if(cell == Cell.WALL) {
+            // Sockelleiste unten, darueber die Wandvarianten — gibt jedem Level eine eigene Linie
+            boolean stained = this.isDoorStain(layout, cx, cz, rnd);
+            this.set(unit, worldX, baseY + 2, worldZ, stained ? this.stainBlock(rnd) : palette.wallBase());
+            Block wall = palette.rndWall(rnd);
+            for(int y = baseY + 3; y < ceilingY; y++) {
+                this.set(unit, worldX, y, worldZ, stained && rnd.nextInt(3) > 0 ? this.stainBlock(rnd) : wall);
+            }
+        } else if(cell == Cell.PILLAR) {
+            for(int y = baseY + 2; y < ceilingY; y++) {
+                this.set(unit, worldX, y, worldZ, palette.pillar());
+            }
+        } else if(cell == Cell.DOOR) {
+            // Tuerwand mit begehbarem Durchgang: entlang der Laufrichtung wird eine
+            // 1 Block breite Schneise durch die Zellentiefe gecarvt, mittig sitzt die Eisentuer
+            String facing = this.doorFacing(layout, cx, cz);
+            boolean passageAlongX = facing.equals("east") || facing.equals("west");
+            int localX = Math.floorMod(worldX, LevelLayout.CELL_SIZE);
+            int localZ = Math.floorMod(worldZ, LevelLayout.CELL_SIZE);
+            boolean onPassage = passageAlongX ? localZ == 1 : localX == 1;
+            boolean isCenter = localX == 1 && localZ == 1;
+
+            if(isCenter) {
+                this.set(unit, worldX, baseY + 2, worldZ, Block.IRON_DOOR.withProperties(Map.of("half", "lower", "facing", facing)));
+                this.set(unit, worldX, baseY + 3, worldZ, Block.IRON_DOOR.withProperties(Map.of("half", "upper", "facing", facing)));
+                for(int y = baseY + 4; y < ceilingY; y++) {
+                    this.set(unit, worldX, y, worldZ, palette.rndWall(rnd));
+                }
+            } else if(onPassage) {
+                // Durchgang: unten frei, Tuersturz darueber
+                for(int y = baseY + 4; y < ceilingY; y++) {
+                    this.set(unit, worldX, y, worldZ, palette.rndWall(rnd));
+                }
+            } else {
+                this.set(unit, worldX, baseY + 2, worldZ, palette.wallBase());
+                Block wall = palette.rndWall(rnd);
+                for(int y = baseY + 3; y < ceilingY; y++) {
+                    this.set(unit, worldX, y, worldZ, wall);
+                }
+            }
+        } else if(cell == Cell.THIN_WALL_X || cell == Cell.THIN_WALL_Z || cell == Cell.THIN_PILLAR) {
+            // Prototyp-Optik: 1 Block duenne Wandebene bzw. Eckpfosten in der Zellenmitte;
+            // der Pfosten schlaegt Wand-Arme zu angrenzenden Segmenten, damit an den
+            // Rasterpunkten keine Ein-Block-Luecken bleiben
+            int localX = Math.floorMod(worldX, LevelLayout.CELL_SIZE);
+            int localZ = Math.floorMod(worldZ, LevelLayout.CELL_SIZE);
+            boolean isCenter = localX == 1 && localZ == 1;
+            boolean solid = switch(cell) {
+                case THIN_WALL_X -> localZ == 1;
+                case THIN_WALL_Z -> localX == 1;
+                default -> isCenter
+                    || localZ == 1 && localX == 0 && this.joinsThinWallX(layout, cx - 1, cz)
+                    || localZ == 1 && localX == 2 && this.joinsThinWallX(layout, cx + 1, cz)
+                    || localX == 1 && localZ == 0 && this.joinsThinWallZ(layout, cx, cz - 1)
+                    || localX == 1 && localZ == 2 && this.joinsThinWallZ(layout, cx, cz + 1);
+            };
+            if(solid) {
+                Block block = cell == Cell.THIN_PILLAR && isCenter ? palette.pillar() : palette.rndWall(rnd);
+                for(int y = baseY + 2; y < ceilingY; y++) {
+                    this.set(unit, worldX, y, worldZ, block);
+                }
+            }
+        } else if(cell == Cell.PIPE || cell == Cell.LEAK) {
+            // Kupfer-Leitung unter der Decke; beim Leck laeuft eine Wassersaeule herab
+            Block duct = rnd.nextInt(3) == 0 ? Block.EXPOSED_COPPER : Block.WAXED_COPPER_BLOCK;
+            this.set(unit, worldX, ceilingY - 1, worldZ, duct);
+            if(cell == Cell.LEAK && this.isCenterColumn(worldX, worldZ)) {
+                for(int y = baseY + 2; y < ceilingY - 1; y++) {
+                    this.set(unit, worldX, y, worldZ, Block.WATER);
+                }
+            }
+        } else if(cell == Cell.EXIT && transition == TransitionType.LADDER) {
+            // Leiter an der westlichen Schachtwand
+            if(Math.floorMod(worldX, LevelLayout.CELL_SIZE) == 0) {
+                for(int y = baseY - LevelRuntime.LEVEL_HEIGHT + 2; y < ceilingY; y++) {
+                    this.set(unit, worldX, y, worldZ, Block.LADDER.withProperty("facing", "east"));
+                }
+            }
+        }
+
+        // Decke + Abschluss; Exit-Schaechte des Levels darueber durchbrechen beides —
+        // dort muss auch die per fillHeight gesetzte Zwischenschicht wieder aufgehen
+        if(this.shaftFromAbove(levelIndex, worldX, worldZ)) {
+            // Roehre freiraeumen — bei Leiter-Schaechten bleibt die Leiter an der Westwand erhalten
+            LevelRuntime above = this.levels.get(levelIndex - 1);
+            boolean ladderColumn = above.getDefinition().transitionType() == TransitionType.LADDER
+                && Math.floorMod(worldX, LevelLayout.CELL_SIZE) == 0;
+            Block fill = ladderColumn ? Block.LADDER.withProperty("facing", "east") : Block.AIR;
+            for(int y = ceilingY; y < baseY + LevelRuntime.LEVEL_HEIGHT; y++) {
+                this.set(unit, worldX, y, worldZ, fill);
+            }
+            return;
+        }
+
+        boolean isLight = this.isLightColumn(levelIndex, cx, cz, worldX, worldZ)
+            || this.isEscapeGoal(layout, cx, transition);
+        this.set(unit, worldX, ceilingY, worldZ, isLight ? palette.light() : palette.rndCeiling(rnd));
+        this.set(unit, worldX, ceilingY + 1, worldZ, Block.BEDROCK);
+    }
+
+    /** Grenzt an dieser Nachbarzelle ein Wandsegment entlang X (oder eine massive Wand) an? */
+    private boolean joinsThinWallX(LevelLayout layout, int cx, int cz) {
+        Cell neighbour = layout.cellAt(cx, cz);
+        return neighbour == Cell.THIN_WALL_X || neighbour == Cell.WALL;
+    }
+
+    /** Grenzt an dieser Nachbarzelle ein Wandsegment entlang Z (oder eine massive Wand) an? */
+    private boolean joinsThinWallZ(LevelLayout layout, int cx, int cz) {
+        Cell neighbour = layout.cellAt(cx, cz);
+        return neighbour == Cell.THIN_WALL_Z || neighbour == Cell.WALL;
+    }
+
+    /**
+     * "Ruined-Portal-Fleck" um die Schluesseltuer: Korruption breitet sich mit
+     * abnehmender Dichte ueber Boden und Waende aus und macht die Tuer weithin sichtbar.
+     */
+    private boolean isDoorStain(LevelLayout layout, int cx, int cz, Random rnd) {
+        int[] door = layout.getDoorCell();
+        if(door == null) return false;
+        int distance = Math.max(Math.abs(cx - door[0]), Math.abs(cz - door[1]));
+        if(distance > 3) return false;
+        double chance = switch(distance) {
+            case 0, 1 -> 0.85;
+            case 2 -> 0.45;
+            default -> 0.15;
+        };
+        return rnd.nextDouble() < chance;
+    }
+
+    private Block stainBlock(Random rnd) {
+        int roll = rnd.nextInt(10);
+        if(roll == 0) return Block.CRYING_OBSIDIAN;
+        if(roll == 1) return Block.GILDED_BLACKSTONE;
+        if(roll <= 4) return Block.OBSIDIAN;
+        return Block.BLACKSTONE;
+    }
+
+    /** Ziel-Band des Finales: alle begehbaren Zellen ab der Exit-Zelle leuchten */
+    private boolean isEscapeGoal(LevelLayout layout, int cx, TransitionType transition) {
+        if(transition != TransitionType.ESCAPE) return false;
+        int[] exit = layout.getExitCell();
+        return exit != null && cx >= exit[0];
+    }
+
+    /**
+     * Blickrichtung der Tuer: vom Exit weg (Exit-Kammer) bzw. zur begehbaren
+     * Seite hin (Seitentueren im Finale-Korridor).
+     */
+    private String doorFacing(LevelLayout layout, int cx, int cz) {
+        if(layout.cellAt(cx - 1, cz) == Cell.EXIT) return "east";
+        if(layout.cellAt(cx + 1, cz) == Cell.EXIT) return "west";
+        if(layout.cellAt(cx, cz - 1) == Cell.EXIT) return "south";
+        if(layout.cellAt(cx, cz + 1) == Cell.EXIT) return "north";
+        if(layout.isWalkable(cx, cz - 1) || layout.isWalkable(cx, cz + 1)) return "north";
+        return "east";
+    }
+
+    /** Lichtblock in der Deckenmitte jeder Lichtzelle */
+    private boolean isLightColumn(int levelIndex, int cx, int cz, int worldX, int worldZ) {
+        if(!this.isCenterColumn(worldX, worldZ)) return false;
+        return this.lightKeys.get(levelIndex).contains(cellKey(cx, cz));
+    }
+
+    private boolean isCenterColumn(int worldX, int worldZ) {
+        int centerOffset = LevelLayout.CELL_SIZE / 2;
+        return Math.floorMod(worldX - centerOffset, LevelLayout.CELL_SIZE) == 0
+            && Math.floorMod(worldZ - centerOffset, LevelLayout.CELL_SIZE) == 0;
+    }
+
+    private boolean isChestCell(int levelIndex, int cx, int cz) {
+        return this.chestKeys.get(levelIndex).contains(cellKey(cx, cz));
+    }
+
+    /** Faellt an dieser Saeule ein HOLE/LADDER-Schacht aus dem Level darueber herein? */
+    private boolean shaftFromAbove(int levelIndex, int worldX, int worldZ) {
+        if(levelIndex == 0) return false;
+        LevelRuntime above = this.levels.get(levelIndex - 1);
+        TransitionType transition = above.getDefinition().transitionType();
+        if(transition != TransitionType.HOLE && transition != TransitionType.LADDER) return false;
+
+        LevelLayout aboveLayout = above.getLayout();
+        int[] exit = aboveLayout.getExitCell();
+        if(exit == null) return false;
+        return aboveLayout.cellX(worldX) == exit[0] && aboveLayout.cellZ(worldZ) == exit[1];
+    }
+
+    private void set(GenerationUnit unit, int x, int y, int z, Block block) {
+        unit.modifier().setBlock(x, y, z, block);
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/generator/MazeAlgorithms.java

@@ -0,0 +1,300 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.generator;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout.Cell;
+
+import java.util.ArrayDeque;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.Deque;
+import java.util.List;
+import java.util.Random;
+
+/**
+ * Layout-Bausteine: Labyrinth (Recursive Backtracker), Braiding (Sackgassen oeffnen),
+ * Raum-Carving und BFS-Distanzkarten. Arbeitet rein auf dem Zellenraster — servertauglich
+ * und unit-testbar ohne Minestom.
+ */
+public final class MazeAlgorithms {
+    private static final int[][] DIRECTIONS = {{1, 0}, {-1, 0}, {0, 1}, {0, -1}};
+
+    private MazeAlgorithms() {
+    }
+
+    /**
+     * Carvt ein perfektes Labyrinth in das (komplett mit WALL gefuellte) Layout.
+     * Maze-Knoten liegen auf ungeraden Zellkoordinaten; der Rand (Zelle 0 und cells-1) bleibt Wand.
+     */
+    public static void backtracker(LevelLayout layout, Random rnd) {
+        int cells = layout.getCells();
+        boolean[][] visited = new boolean[cells][cells];
+        Deque<int[]> stack = new ArrayDeque<>();
+
+        int[] start = {1, 1};
+        visited[start[0]][start[1]] = true;
+        layout.setCell(start[0], start[1], Cell.FLOOR);
+        stack.push(start);
+
+        while(!stack.isEmpty()) {
+            int[] current = stack.peek();
+            List<int[]> candidates = new ArrayList<>();
+            for(int[] dir : DIRECTIONS) {
+                int nx = current[0] + dir[0] * 2;
+                int nz = current[1] + dir[1] * 2;
+                if(nx <= 0 || nz <= 0 || nx >= cells - 1 || nz >= cells - 1) continue;
+                if(!visited[nx][nz]) candidates.add(new int[]{nx, nz, dir[0], dir[1]});
+            }
+
+            if(candidates.isEmpty()) {
+                stack.pop();
+                continue;
+            }
+
+            int[] next = candidates.get(rnd.nextInt(candidates.size()));
+            visited[next[0]][next[1]] = true;
+            layout.setCell(current[0] + next[2], current[1] + next[3], Cell.FLOOR);
+            layout.setCell(next[0], next[1], Cell.FLOOR);
+            stack.push(new int[]{next[0], next[1]});
+        }
+    }
+
+    /**
+     * Oeffnet den angegebenen Anteil aller Sackgassen, indem eine zufaellige
+     * angrenzende Wand zu FLOOR wird — macht das Labyrinth schleifenreich.
+     */
+    public static void braid(LevelLayout layout, Random rnd, double ratio) {
+        int cells = layout.getCells();
+        List<int[]> deadEnds = new ArrayList<>();
+        for(int x = 1; x < cells - 1; x++) {
+            for(int z = 1; z < cells - 1; z++) {
+                if(!layout.isWalkable(x, z)) continue;
+                int open = 0;
+                for(int[] dir : DIRECTIONS) {
+                    if(layout.isWalkable(x + dir[0], z + dir[1])) open++;
+                }
+                if(open == 1) deadEnds.add(new int[]{x, z});
+            }
+        }
+
+        Collections.shuffle(deadEnds, rnd);
+        int toOpen = (int) Math.round(deadEnds.size() * ratio);
+        for(int i = 0; i < toOpen; i++) {
+            int[] deadEnd = deadEnds.get(i);
+            List<int[]> walls = new ArrayList<>();
+            for(int[] dir : DIRECTIONS) {
+                int wx = deadEnd[0] + dir[0];
+                int wz = deadEnd[1] + dir[1];
+                int behindX = deadEnd[0] + dir[0] * 2;
+                int behindZ = deadEnd[1] + dir[1] * 2;
+                if(wx <= 0 || wz <= 0 || wx >= cells - 1 || wz >= cells - 1) continue;
+                if(layout.cellAt(wx, wz) == Cell.WALL && layout.isWalkable(behindX, behindZ)) {
+                    walls.add(new int[]{wx, wz});
+                }
+            }
+            if(!walls.isEmpty()) {
+                int[] wall = walls.get(rnd.nextInt(walls.size()));
+                layout.setCell(wall[0], wall[1], Cell.FLOOR);
+            }
+        }
+    }
+
+    /**
+     * Raeumt zufaellige Rechtecke frei (Raeume). Entfernt nur Waende, die Konnektivitaet
+     * des Labyrinths bleibt daher erhalten.
+     */
+    public static void carveRooms(LevelLayout layout, Random rnd, int roomCount, int minSize, int maxSize) {
+        int cells = layout.getCells();
+        for(int i = 0; i < roomCount; i++) {
+            int width = minSize + rnd.nextInt(maxSize - minSize + 1);
+            int depth = minSize + rnd.nextInt(maxSize - minSize + 1);
+            int startX = 1 + rnd.nextInt(Math.max(1, cells - width - 2));
+            int startZ = 1 + rnd.nextInt(Math.max(1, cells - depth - 2));
+            for(int x = startX; x < startX + width; x++) {
+                for(int z = startZ; z < startZ + depth; z++) {
+                    if(x >= cells - 1 || z >= cells - 1) continue;
+                    if(layout.cellAt(x, z) == Cell.WALL) layout.setCell(x, z, Cell.FLOOR);
+                }
+            }
+        }
+    }
+
+    /**
+     * BFS-Distanzen (in Zellen) von einer Startzelle aus; -1 = unerreichbar.
+     */
+    public static int[][] bfsDistances(LevelLayout layout, int[] start) {
+        int cells = layout.getCells();
+        int[][] distances = new int[cells][cells];
+        for(int[] row : distances) Arrays.fill(row, -1);
+
+        Deque<int[]> queue = new ArrayDeque<>();
+        distances[start[0]][start[1]] = 0;
+        queue.add(start);
+        while(!queue.isEmpty()) {
+            int[] current = queue.poll();
+            for(int[] dir : DIRECTIONS) {
+                int nx = current[0] + dir[0];
+                int nz = current[1] + dir[1];
+                if(!layout.inBounds(nx, nz) || !layout.isWalkable(nx, nz)) continue;
+                if(distances[nx][nz] != -1) continue;
+                distances[nx][nz] = distances[current[0]][current[1]] + 1;
+                queue.add(new int[]{nx, nz});
+            }
+        }
+        return distances;
+    }
+
+    /**
+     * Alle begehbaren Zellen, deren BFS-Distanz im Perzentil-Fenster [minPercentile, maxPercentile]
+     * der maximalen Distanz liegt.
+     */
+    public static List<int[]> cellsInDistancePercentile(LevelLayout layout, int[][] distances, double minPercentile, double maxPercentile) {
+        int max = 0;
+        for(int[] row : distances) {
+            for(int distance : row) max = Math.max(max, distance);
+        }
+
+        List<int[]> result = new ArrayList<>();
+        for(int x = 0; x < layout.getCells(); x++) {
+            for(int z = 0; z < layout.getCells(); z++) {
+                int distance = distances[x][z];
+                if(distance < 0) continue;
+                double percentile = max == 0 ? 0 : (double) distance / max;
+                if(percentile >= minPercentile && percentile <= maxPercentile) result.add(new int[]{x, z});
+            }
+        }
+        return result;
+    }
+
+    /**
+     * Offene Halle: alle Innenzellen werden begehbar, nur der Rand bleibt Wand.
+     * Grundlage fuer Level mit "grosser Raum statt Gaenge"-Charakter (Parkhaus, Poolrooms).
+     */
+    public static void openField(LevelLayout layout) {
+        int cells = layout.getCells();
+        for(int x = 1; x < cells - 1; x++) {
+            for(int z = 1; z < cells - 1; z++) {
+                layout.setCell(x, z, Cell.FLOOR);
+            }
+        }
+    }
+
+    /**
+     * Verstreut gerade Wandzuege (mit gelegentlichen Luecken und L-Knicken) in einer
+     * offenen Flaeche — ergibt Sichtblocker und Raumgefuehl statt Korridore.
+     */
+    public static void scatterWallRuns(LevelLayout layout, Random rnd, int runCount, int minLength, int maxLength) {
+        int cells = layout.getCells();
+        for(int i = 0; i < runCount; i++) {
+            int x = 2 + rnd.nextInt(cells - 4);
+            int z = 2 + rnd.nextInt(cells - 4);
+            int[] dir = DIRECTIONS[rnd.nextInt(DIRECTIONS.length)];
+            int length = minLength + rnd.nextInt(Math.max(1, maxLength - minLength + 1));
+
+            for(int step = 0; step < length; step++) {
+                if(x <= 1 || z <= 1 || x >= cells - 2 || z >= cells - 2) break;
+                // gelegentliche Luecke, damit keine Sackgassen-Kaefige entstehen
+                if(rnd.nextInt(8) != 0) layout.setCell(x, z, Cell.WALL);
+                // seltener L-Knick
+                if(rnd.nextInt(6) == 0) dir = DIRECTIONS[rnd.nextInt(DIRECTIONS.length)];
+                x += dir[0];
+                z += dir[1];
+            }
+        }
+    }
+
+    /**
+     * Verbindet eine (moeglicherweise eingemauerte) Zelle mit der Hauptkomponente:
+     * BFS durch Waende bis zur ersten Zelle mit rootDistances >= 0, Pfad wird gecarvt.
+     */
+    public static void connectToComponent(LevelLayout layout, int[][] rootDistances, int[] start) {
+        int cells = layout.getCells();
+        Deque<int[]> queue = new ArrayDeque<>();
+        java.util.Map<Long, int[]> cameFrom = new java.util.HashMap<>();
+        queue.add(start);
+        cameFrom.put(key(start[0], start[1]), null);
+
+        while(!queue.isEmpty()) {
+            int[] current = queue.poll();
+            for(int[] dir : DIRECTIONS) {
+                int nx = current[0] + dir[0];
+                int nz = current[1] + dir[1];
+                if(nx <= 0 || nz <= 0 || nx >= cells - 1 || nz >= cells - 1) continue;
+                // Exit-Kammern sind tabu: weder durch die Tuer noch durch die Kammermauern carven
+                if(isChamberProtected(layout, nx, nz)) continue;
+                long cellKey = key(nx, nz);
+                if(cameFrom.containsKey(cellKey)) continue;
+                cameFrom.put(cellKey, current);
+
+                if(rootDistances[nx][nz] >= 0) {
+                    // Pfad zurueckverfolgen und freiraeumen
+                    int[] step = current;
+                    while(step != null) {
+                        if(!layout.isWalkable(step[0], step[1])) layout.setCell(step[0], step[1], Cell.FLOOR);
+                        step = cameFrom.get(key(step[0], step[1]));
+                    }
+                    return;
+                }
+                queue.add(new int[]{nx, nz});
+            }
+        }
+    }
+
+    /**
+     * Stellt sicher, dass alle wichtigen Zellen von root aus erreichbar sind;
+     * abgetrennte Zellen werden per Wanddurchbruch angebunden.
+     */
+    public static void ensureConnected(LevelLayout layout, int[] root, List<int[]> important) {
+        int[][] distances = bfsDistances(layout, root);
+        for(int[] cell : important) {
+            if(!layout.inBounds(cell[0], cell[1])) continue;
+            if(distances[cell[0]][cell[1]] >= 0) continue;
+            connectToComponent(layout, distances, cell);
+            distances = bfsDistances(layout, root);
+        }
+    }
+
+    private static long key(int x, int z) {
+        return ((long) x << 32) | (z & 0xFFFFFFFFL);
+    }
+
+    /** Zelle gehoert zur verschlossenen Exit-Kammer (Tuer, Exit oder Kammermauer-Ring). */
+    public static boolean isChamberProtected(LevelLayout layout, int cx, int cz) {
+        LevelLayout.Cell cell = layout.cellAt(cx, cz);
+        if(cell == LevelLayout.Cell.DOOR || cell == LevelLayout.Cell.EXIT) return true;
+        for(int dx = -1; dx <= 1; dx++) {
+            for(int dz = -1; dz <= 1; dz++) {
+                if(layout.cellAt(cx + dx, cz + dz) == LevelLayout.Cell.EXIT) return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Rejection-Sampling: bis zu count Zellen aus candidates mit paarweisem Mindestabstand.
+     * Faellt der Abstand nicht mehr erfuellbar aus, wird er schrittweise verringert.
+     */
+    public static List<int[]> sampleSpread(List<int[]> candidates, Random rnd, int count, double minDistance) {
+        List<int[]> pool = new ArrayList<>(candidates);
+        Collections.shuffle(pool, rnd);
+        List<int[]> chosen = new ArrayList<>();
+        double distance = minDistance;
+        while(chosen.size() < count && distance >= 0) {
+            for(int[] candidate : pool) {
+                if(chosen.size() >= count) break;
+                boolean fits = true;
+                for(int[] existing : chosen) {
+                    double dx = candidate[0] - existing[0];
+                    double dz = candidate[1] - existing[1];
+                    if(Math.sqrt(dx * dx + dz * dz) < distance) {
+                        fits = false;
+                        break;
+                    }
+                }
+                if(fits) chosen.add(candidate);
+            }
+            distance -= 1;
+        }
+        return chosen;
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/item/BackroomsItems.java

@@ -0,0 +1,106 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.item;
+
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.format.NamedTextColor;
+import net.kyori.adventure.text.format.TextDecoration;
+import net.minestom.server.component.DataComponents;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.item.ItemStack;
+import net.minestom.server.item.Material;
+import net.minestom.server.entity.Player;
+import net.minestom.server.item.component.LodestoneTracker;
+import net.minestom.server.tag.Tag;
+
+import java.util.function.Predicate;
+
+/**
+ * ItemStack-Fabriken und Tag-basierte Erkennung aller Backrooms-Items.
+ */
+public final class BackroomsItems {
+    public static final Tag<String> ITEM_TAG = Tag.String("backroomsItem");
+    public static final Tag<Integer> KEY_LEVEL_TAG = Tag.Integer("backroomsKeyLevel");
+
+    public static final String ALMOND_WATER = "almond_water";
+    public static final String ENERGY_BAR = "energy_bar";
+    public static final String LEVEL_KEY = "level_key";
+    public static final String DOOR_COMPASS = "door_compass";
+
+    private BackroomsItems() {
+    }
+
+    /** Stellt Sanity wieder her und heilt leicht — das Kern-Loot der Backrooms. */
+    public static ItemStack almondWater() {
+        return ItemStack.builder(Material.POTION)
+            .customName(Component.text("Almond Water", NamedTextColor.AQUA).decoration(TextDecoration.ITALIC, false))
+            .set(ITEM_TAG, ALMOND_WATER)
+            .build();
+    }
+
+    /** Kurzer Geschwindigkeits-Schub (auch als Strecken-Pickup im Finale). */
+    public static ItemStack energyBar() {
+        return ItemStack.builder(Material.GOLDEN_CARROT)
+            .customName(Component.text("Energy Bar", NamedTextColor.GOLD).decoration(TextDecoration.ITALIC, false))
+            .set(ITEM_TAG, ENERGY_BAR)
+            .build();
+    }
+
+    /** Schluessel fuer die verschlossene Exit-Kammer des angegebenen Levels. */
+    public static ItemStack levelKey(int levelIndex) {
+        return ItemStack.builder(Material.TRIPWIRE_HOOK)
+            .customName(Component.text("Level Key", NamedTextColor.YELLOW).decoration(TextDecoration.ITALIC, false))
+            .set(ITEM_TAG, LEVEL_KEY)
+            .set(KEY_LEVEL_TAG, levelIndex)
+            .build();
+    }
+
+    /** Kompass, der zur verschlossenen Tuer des Levels zeigt. */
+    public static ItemStack doorCompass(int levelIndex, String dimension, Point doorPosition) {
+        return ItemStack.builder(Material.COMPASS)
+            .customName(Component.text("Door Compass", NamedTextColor.YELLOW).decoration(TextDecoration.ITALIC, false))
+            .set(DataComponents.LODESTONE_TRACKER, new LodestoneTracker(dimension, doorPosition, false))
+            .set(ITEM_TAG, DOOR_COMPASS)
+            .set(KEY_LEVEL_TAG, levelIndex)
+            .build();
+    }
+
+    /** Entfernt alle Items, auf die das Praedikat passt, aus dem Spieler-Inventar. */
+    public static void removeMatching(Player player, Predicate<ItemStack> filter) {
+        var inventory = player.getInventory();
+        for(int slot = 0; slot < inventory.getSize(); slot++) {
+            if(filter.test(inventory.getItemStack(slot))) inventory.setItemStack(slot, ItemStack.AIR);
+        }
+    }
+
+    public static boolean hasMatching(Player player, Predicate<ItemStack> filter) {
+        var inventory = player.getInventory();
+        for(int slot = 0; slot < inventory.getSize(); slot++) {
+            if(filter.test(inventory.getItemStack(slot))) return true;
+        }
+        return false;
+    }
+
+    public static int count(Player player, String itemId) {
+        int count = 0;
+        var inventory = player.getInventory();
+        for(int slot = 0; slot < inventory.getSize(); slot++) {
+            ItemStack item = inventory.getItemStack(slot);
+            if(is(item, itemId)) count += item.amount();
+        }
+        return count;
+    }
+
+    public static boolean is(ItemStack item, String id) {
+        return id.equals(item.getTag(ITEM_TAG));
+    }
+
+    /** Key oder Tuerkompass fuer das angegebene Level (beides verfaellt beim Tueroeffnen). */
+    public static boolean isDoorItemFor(ItemStack item, int levelIndex) {
+        String id = item.getTag(ITEM_TAG);
+        if(!LEVEL_KEY.equals(id) && !DOOR_COMPASS.equals(id)) return false;
+        return Integer.valueOf(levelIndex).equals(item.getTag(KEY_LEVEL_TAG));
+    }
+
+    public static boolean isKeyFor(ItemStack item, int levelIndex) {
+        return is(item, LEVEL_KEY) && Integer.valueOf(levelIndex).equals(item.getTag(KEY_LEVEL_TAG));
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/LevelDefinition.java

@@ -0,0 +1,229 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience.AmbienceProfile;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.generator.MazeAlgorithms;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.BackroomsMonster;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+
+/**
+ * Bauplan eines Leveltyps: Layout-Erzeugung, Blockpalette, Uebergang, Ambience und
+ * Monster-Besatz. Pro Spiel wird je Level eine frische Instanz erzeugt — Level-Events
+ * (Blackouts, Lichtausfaelle, Duelle) duerfen daher eigenen Zustand halten.
+ */
+public abstract class LevelDefinition {
+
+    public abstract LevelType type();
+
+    public abstract LevelLayout buildLayout(Random rnd, int cells, int playerCount);
+
+    public abstract LevelPalette palette();
+
+    public abstract TransitionType transitionType();
+
+    public abstract AmbienceProfile ambience();
+
+    /** Initiale Monster-Population; density 1-3 aus der Spielkonfiguration. */
+    public void populateMonsters(BackroomsGame game, LevelRuntime runtime, int density) {
+    }
+
+    /** Wird ~1x pro Sekunde aufgerufen, solange Spieler im Level sind (Events wie Blackouts). */
+    public void onLevelTick(BackroomsGame game, LevelRuntime runtime) {
+    }
+
+    /**
+     * Dynamischer Nachschub des Monster-Directors: liefert ein Monster fuer die gegebene
+     * Zelle in Spielernaehe — oder null, wenn dort (oder in diesem Level) nichts spawnen soll.
+     * Das Monster wird vom Director gespawnt und registriert.
+     */
+    public BackroomsMonster createRoamingMonster(LevelRuntime runtime, int[] cell) {
+        return null;
+    }
+
+    /** Exit-Kammer verschlossen, Schluessel in einer Kiste versteckt? */
+    public boolean usesKeyDoor() {
+        return false;
+    }
+
+    /**
+     * true: jeder Key oeffnet nur die angeklickte Tuer und wird verbraucht (Finale-Seitentueren);
+     * false: ein Key oeffnet die Exit-Kammer fuer alle, danach zerfallen alle Keys.
+     */
+    public boolean opensSingleDoors() {
+        return false;
+    }
+
+    /** Permanente Dunkelheit (Lights Out): DARKNESS-Effekt unabhaengig von darkZones. */
+    public boolean permanentDarkness() {
+        return false;
+    }
+
+    /**
+     * Standard-Bauweise fuer Maze-Level: Backtracker, Braiding, Raeume, dann garantierte
+     * Platzierung von Spawns (verteilt), Exit (fern der Spawns, optional mit verschlossener
+     * Kammer + Schluessel), Kisten und Lichtzellen.
+     */
+    protected LevelLayout standardLayout(
+        Random rnd,
+        int cells,
+        int playerCount,
+        double braidRatio,
+        int roomCount,
+        int maxRoomSize,
+        double chestsPerHundredCells
+    ) {
+        LevelLayout layout = new LevelLayout(cells);
+        MazeAlgorithms.backtracker(layout, rnd);
+        MazeAlgorithms.braid(layout, rnd, braidRatio);
+        MazeAlgorithms.carveRooms(layout, rnd, roomCount, 3, maxRoomSize);
+        return this.finalizeLayout(layout, rnd, playerCount, chestsPerHundredCells);
+    }
+
+    /**
+     * Alternative Bauweise: offene Halle mit verstreuten Wandzuegen statt Gaenge-Labyrinth.
+     * Fuer Level mit "grosser offener Raum"-Charakter (Parkhaus, Poolrooms).
+     */
+    protected LevelLayout openLayout(
+        Random rnd,
+        int cells,
+        int playerCount,
+        int wallRunCount,
+        double chestsPerHundredCells
+    ) {
+        LevelLayout layout = new LevelLayout(cells);
+        MazeAlgorithms.openField(layout);
+        MazeAlgorithms.scatterWallRuns(layout, rnd, wallRunCount, 3, Math.max(5, cells / 4));
+        return this.finalizeLayout(layout, rnd, playerCount, chestsPerHundredCells);
+    }
+
+    /** Gemeinsame Platzierung: Spawns, Exit (+Kammer), Kisten, Konnektivitaet, Licht. */
+    protected LevelLayout finalizeLayout(LevelLayout layout, Random rnd, int playerCount, double chestsPerHundredCells) {
+        int cells = layout.getCells();
+
+        // Spawns: ueber die ganze Flaeche verteilt, damit auch viele Spieler nicht clustern
+        int[][] fromCorner = MazeAlgorithms.bfsDistances(layout, new int[]{1, 1});
+        List<int[]> allFloor = MazeAlgorithms.cellsInDistancePercentile(layout, fromCorner, 0, 1);
+        int spawnCount = Math.max(8, playerCount + 2);
+        layout.getSpawnCells().addAll(MazeAlgorithms.sampleSpread(allFloor, rnd, spawnCount, cells / 4.0));
+
+        // Exit: weit weg vom Spawn-Schwerpunkt
+        int[] centroid = this.spawnCentroid(layout);
+        int[][] fromCentroid = MazeAlgorithms.bfsDistances(layout, this.nearestWalkable(layout, centroid));
+        List<int[]> farCells = MazeAlgorithms.cellsInDistancePercentile(layout, fromCentroid, 0.8, 1.0);
+        int[] exit = farCells.isEmpty() ? allFloor.getLast() : farCells.get(rnd.nextInt(farCells.size()));
+        layout.setExitCell(exit);
+        layout.setCell(exit[0], exit[1], LevelLayout.Cell.EXIT);
+
+        int[] doorOutside = this.usesKeyDoor() ? this.buildExitChamber(layout, rnd, fromCentroid, allFloor) : null;
+
+        // Kisten verteilt ueber die Flaeche
+        int chestCount = (int) Math.max(3, cells * cells * chestsPerHundredCells / 100.0);
+        List<int[]> chestSpots = MazeAlgorithms.sampleSpread(allFloor, rnd, chestCount, cells / 6.0);
+        chestSpots.removeIf(cell -> layout.cellAt(cell[0], cell[1]) != LevelLayout.Cell.FLOOR);
+        // Kisten nie auf Spawn-Zellen — sonst steht der Barrel im Spieler
+        chestSpots.removeIf(cell -> layout.getSpawnCells().stream()
+            .anyMatch(spawn -> spawn[0] == cell[0] && spawn[1] == cell[1]));
+        layout.getChestCells().addAll(chestSpots);
+
+        // Die Kammer-Mauern (oder Pech beim Carven) koennen Bereiche abtrennen —
+        // alle spielrelevanten Zellen garantiert mit der Hauptkomponente verbinden
+        List<int[]> important = new ArrayList<>(layout.getSpawnCells());
+        important.addAll(layout.getChestCells());
+        if(layout.getKeyChestCell() != null) important.add(layout.getKeyChestCell());
+        if(doorOutside != null) important.add(doorOutside);
+        if(!this.usesKeyDoor()) important.add(layout.getExitCell());
+        MazeAlgorithms.ensureConnected(layout, layout.getSpawnCells().getFirst(), important);
+
+        // Lichtzellen im Raster, ausserhalb von Dunkelzonen (darkZones setzen Level-Impls vorher/nachher)
+        for(int x = 1; x < cells - 1; x += 2) {
+            for(int z = 1; z < cells - 1; z += 2) {
+                if(layout.isWalkable(x, z) && !layout.isDarkCell(x, z)) layout.getLightCells().add(new int[]{x, z});
+            }
+        }
+
+        return layout;
+    }
+
+    /**
+     * Ummauert die Exit-Zelle (3x3) und setzt genau einen DOOR-Zugang mit garantiert
+     * begehbarer Zelle davor; der Schluessel landet als Kiste im freien Bereich.
+     *
+     * @return die Zelle direkt vor der Tuer (fuer die Konnektivitaetspruefung)
+     */
+    private int[] buildExitChamber(LevelLayout layout, Random rnd, int[][] distances, List<int[]> allFloor) {
+        int[] exit = layout.getExitCell();
+
+        // Tuer-Richtung waehlen, bevor der Ring zugemauert wird: bevorzugt eine Richtung,
+        // deren Vorfeld-Zelle (exit + 2*dir) bereits begehbar ist
+        int[][] directions = {{1, 0}, {-1, 0}, {0, 1}, {0, -1}};
+        List<int[]> valid = new ArrayList<>();
+        List<int[]> preferred = new ArrayList<>();
+        for(int[] dir : directions) {
+            int outsideX = exit[0] + dir[0] * 2;
+            int outsideZ = exit[1] + dir[1] * 2;
+            if(outsideX <= 0 || outsideZ <= 0 || outsideX >= layout.getCells() - 1 || outsideZ >= layout.getCells() - 1) continue;
+            valid.add(dir);
+            if(layout.isWalkable(outsideX, outsideZ)) preferred.add(dir);
+        }
+        List<int[]> pool = preferred.isEmpty() ? valid : preferred;
+        int[] doorDir = pool.get(rnd.nextInt(pool.size()));
+
+        // Ring zumauern
+        for(int dx = -1; dx <= 1; dx++) {
+            for(int dz = -1; dz <= 1; dz++) {
+                if(dx == 0 && dz == 0) continue;
+                int x = exit[0] + dx;
+                int z = exit[1] + dz;
+                if(!layout.inBounds(x, z)) continue;
+                layout.setCell(x, z, LevelLayout.Cell.WALL);
+            }
+        }
+
+        int[] door = {exit[0] + doorDir[0], exit[1] + doorDir[1]};
+        int[] outside = {exit[0] + doorDir[0] * 2, exit[1] + doorDir[1] * 2};
+        layout.setCell(door[0], door[1], LevelLayout.Cell.DOOR);
+        layout.setDoorCell(door);
+        if(!layout.isWalkable(outside[0], outside[1])) layout.setCell(outside[0], outside[1], LevelLayout.Cell.FLOOR);
+
+        List<int[]> keySpots = MazeAlgorithms.cellsInDistancePercentile(layout, distances, 0.3, 0.7);
+        keySpots.removeIf(cell -> layout.cellAt(cell[0], cell[1]) != LevelLayout.Cell.FLOOR);
+        // Fallback nur auf Zellen, die nach dem Kammerbau noch begehbar sind
+        List<int[]> keyFallback = allFloor.stream()
+            .filter(cell -> layout.cellAt(cell[0], cell[1]) == LevelLayout.Cell.FLOOR)
+            .toList();
+        int[] keyCell = keySpots.isEmpty()
+            ? keyFallback.get(rnd.nextInt(keyFallback.size()))
+            : keySpots.get(rnd.nextInt(keySpots.size()));
+        layout.setKeyChestCell(keyCell);
+
+        return outside;
+    }
+
+    private int[] spawnCentroid(LevelLayout layout) {
+        int sumX = 0;
+        int sumZ = 0;
+        for(int[] spawn : layout.getSpawnCells()) {
+            sumX += spawn[0];
+            sumZ += spawn[1];
+        }
+        int count = Math.max(1, layout.getSpawnCells().size());
+        return new int[]{sumX / count, sumZ / count};
+    }
+
+    private int[] nearestWalkable(LevelLayout layout, int[] cell) {
+        if(layout.isWalkable(cell[0], cell[1])) return cell;
+        for(int radius = 1; radius < layout.getCells(); radius++) {
+            for(int dx = -radius; dx <= radius; dx++) {
+                for(int dz = -radius; dz <= radius; dz++) {
+                    int x = cell[0] + dx;
+                    int z = cell[1] + dz;
+                    if(layout.inBounds(x, z) && layout.isWalkable(x, z)) return new int[]{x, z};
+                }
+            }
+        }
+        return new int[]{1, 1};
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/LevelLayout.java

@@ -0,0 +1,187 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level;
+
+import net.minestom.server.coordinate.Pos;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+
+/**
+ * Vorab berechnetes Layout eines Levels auf einem quadratischen Zellenraster.
+ * Eine Zelle ist {@link #CELL_SIZE} Bloecke breit; das Raster ist um x=0/z=0 zentriert.
+ * Der Chunk-Generator liest ausschliesslich aus dieser Struktur.
+ */
+public class LevelLayout {
+    public static final int CELL_SIZE = 3;
+
+    public enum Cell {
+        WALL,
+        FLOOR,
+        WATER,
+        /** doppelt tiefes Wasserbecken */
+        DEEP_WATER,
+        PILLAR,
+        /** Deckenleitung (Kupfer-Kanal unter der Decke, darunter begehbar) */
+        PIPE,
+        /** duenne Wand (1 Block) durch die Zellenmitte entlang der X-Achse — Prototyp-Optik von Level 0 */
+        THIN_WALL_X,
+        /** duenne Wand (1 Block) durch die Zellenmitte entlang der Z-Achse */
+        THIN_WALL_Z,
+        /** einzelner Eckpfosten (1x1) in der Zellenmitte */
+        THIN_PILLAR,
+        /** undichte Leitung: Wassersaeule laeuft von der Decke bis in eine Bodenpfuetze */
+        LEAK,
+        /** Exit-Zelle: Wirkung haengt vom TransitionType des Levels ab (Loch, Leiter, Glitch, NoClip-Wand) */
+        EXIT,
+        /** verschlossener Zugang zur Exit-Kammer, wird vom DoorManager geoeffnet */
+        DOOR
+    }
+
+    private final int cells;
+    private final Cell[][] grid;
+    private final boolean[][] darkZone;
+
+    private final List<int[]> spawnCells = new ArrayList<>();
+    private final List<int[]> chestCells = new ArrayList<>();
+    private final List<int[]> lightCells = new ArrayList<>();
+    /** frei nutzbare Level-Marker (z. B. Dampf-Ventile in den Poolrooms) */
+    private final List<int[]> markerCells = new ArrayList<>();
+    private int[] exitCell;
+    private int[] keyChestCell;
+    private int[] doorCell;
+
+    // Generierungs-Bounds: ausserhalb rendert der Generator nichts (Finale nutzt
+    // nur einen schmalen Korridor seines quadratischen Rasters)
+    private int minGenCx = 0;
+    private int maxGenCx = Integer.MAX_VALUE;
+    private int minGenCz = 0;
+    private int maxGenCz = Integer.MAX_VALUE;
+
+    public LevelLayout(int cells) {
+        this.cells = cells;
+        this.grid = new Cell[cells][cells];
+        this.darkZone = new boolean[cells][cells];
+        for(int x = 0; x < cells; x++) {
+            for(int z = 0; z < cells; z++) {
+                this.grid[x][z] = Cell.WALL;
+            }
+        }
+    }
+
+    public int getCells() {
+        return this.cells;
+    }
+
+    public boolean inBounds(int cx, int cz) {
+        return cx >= 0 && cx < this.cells && cz >= 0 && cz < this.cells;
+    }
+
+    public Cell cellAt(int cx, int cz) {
+        if(!this.inBounds(cx, cz)) return Cell.WALL;
+        return this.grid[cx][cz];
+    }
+
+    public void setCell(int cx, int cz, Cell cell) {
+        this.grid[cx][cz] = cell;
+    }
+
+    public boolean isWalkable(int cx, int cz) {
+        return switch(this.cellAt(cx, cz)) {
+            case FLOOR, WATER, DEEP_WATER, PIPE, LEAK, EXIT -> true;
+            default -> false;
+        };
+    }
+
+
+    public boolean isDarkCell(int cx, int cz) {
+        return this.inBounds(cx, cz) && this.darkZone[cx][cz];
+    }
+
+    public void setDark(int cx, int cz, boolean dark) {
+        this.darkZone[cx][cz] = dark;
+    }
+
+    /**
+     * Weltkoordinate (Block-Ecke) der Zelle; das Raster ist um den Ursprung zentriert.
+     */
+    public int worldX(int cx) {
+        return (cx - this.cells / 2) * CELL_SIZE;
+    }
+
+    public int worldZ(int cz) {
+        return this.worldX(cz);
+    }
+
+    /** Zellkoordinate zu einer Block-Weltkoordinate */
+    public int cellX(double worldX) {
+        return (int) Math.floor(worldX / CELL_SIZE) + this.cells / 2;
+    }
+
+    public int cellZ(double worldZ) {
+        return this.cellX(worldZ);
+    }
+
+    /** Spieler-Position in der Zellenmitte, einen Block ueber dem Boden */
+    public Pos worldCenter(int[] cell, int baseY) {
+        return new Pos(this.worldX(cell[0]) + CELL_SIZE / 2.0, baseY + 2, this.worldZ(cell[1]) + CELL_SIZE / 2.0);
+    }
+
+    public boolean isDarkAt(Pos position) {
+        return this.isDarkCell(this.cellX(position.x()), this.cellZ(position.z()));
+    }
+
+    public List<int[]> getSpawnCells() {
+        return this.spawnCells;
+    }
+
+    public List<int[]> getChestCells() {
+        return this.chestCells;
+    }
+
+    public List<int[]> getLightCells() {
+        return this.lightCells;
+    }
+
+    public List<int[]> getMarkerCells() {
+        return this.markerCells;
+    }
+
+    public int[] getExitCell() {
+        return this.exitCell;
+    }
+
+    public void setExitCell(int[] exitCell) {
+        this.exitCell = exitCell;
+    }
+
+    public int[] getKeyChestCell() {
+        return this.keyChestCell;
+    }
+
+    public int[] getDoorCell() {
+        return this.doorCell;
+    }
+
+    public void setDoorCell(int[] doorCell) {
+        this.doorCell = doorCell;
+    }
+
+    public void setKeyChestCell(int[] keyChestCell) {
+        this.keyChestCell = keyChestCell;
+    }
+
+    public void setGenerationBounds(int minCx, int maxCx, int minCz, int maxCz) {
+        this.minGenCx = minCx;
+        this.maxGenCx = maxCx;
+        this.minGenCz = minCz;
+        this.maxGenCz = maxCz;
+    }
+
+    public boolean inGenerationBounds(int cx, int cz) {
+        return cx >= this.minGenCx && cx <= this.maxGenCx && cz >= this.minGenCz && cz <= this.maxGenCz;
+    }
+
+    public int[] randomSpawnCell(Random rnd) {
+        return this.spawnCells.get(rnd.nextInt(this.spawnCells.size()));
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/LevelPalette.java

@@ -0,0 +1,56 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level;
+
+import net.minestom.server.instance.block.Block;
+
+import java.util.List;
+import java.util.Random;
+
+/**
+ * Blockauswahl eines Levels. Listen erlauben leichte Variation (z. B. fleckiger Teppich);
+ * die Auswahl erfolgt deterministisch aus dem Layout-Random.
+ *
+ * Fuer eine deutliche visuelle Identitaet pro Leveltyp:
+ * - wallBase: abweichende unterste Wandschicht (Sockelleiste)
+ * - checkerFloor: Schachbrettmuster aus den ersten beiden floor-Eintraegen
+ * - floorDeco/ceilingDeco: seltene Deko-Bloecke auf dem Boden bzw. unter der Decke
+ */
+public record LevelPalette(
+    List<Block> floor,
+    List<Block> wall,
+    List<Block> ceiling,
+    Block light,
+    Block pillar,
+    int roomHeight,
+    Block wallBase,
+    boolean checkerFloor,
+    List<Block> floorDeco,
+    double floorDecoChance,
+    List<Block> ceilingDeco,
+    double ceilingDecoChance
+) {
+
+    public Block rndFloor(Random rnd) {
+        return this.floor.get(rnd.nextInt(this.floor.size()));
+    }
+
+    public Block floorAt(int worldX, int worldZ, Random rnd) {
+        if(!this.checkerFloor) return this.rndFloor(rnd);
+        return this.floor.get(Math.floorMod(worldX + worldZ, 2));
+    }
+
+    public Block rndWall(Random rnd) {
+        return this.wall.get(rnd.nextInt(this.wall.size()));
+    }
+
+    public Block rndCeiling(Random rnd) {
+        return this.ceiling.get(rnd.nextInt(this.ceiling.size()));
+    }
+
+    public Block rndFloorDeco(Random rnd) {
+        return this.floorDeco.get(rnd.nextInt(this.floorDeco.size()));
+    }
+
+    public Block rndCeilingDeco(Random rnd) {
+        return this.ceilingDeco.get(rnd.nextInt(this.ceilingDeco.size()));
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/LevelRuntime.java

@@ -0,0 +1,87 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.BackroomsMonster;
+import net.minestom.server.coordinate.Pos;
+import net.minestom.server.entity.Player;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+
+/**
+ * Laufzeit-Zustand eines Levels innerhalb einer Runde: Layout, Hoehenlage,
+ * aktive Monster und Level-Events. Die Level sind in einer Instanz vertikal gestapelt.
+ */
+public class LevelRuntime {
+    public static final int LEVEL_HEIGHT = 24;
+    public static final int TOP_BASE_Y = 96;
+
+    private final BackroomsGame game;
+    private final int index;
+    private final LevelDefinition definition;
+    private final LevelLayout layout;
+    private final Random rnd;
+    private final List<BackroomsMonster> monsters = new ArrayList<>();
+
+    private boolean blackoutActive = false;
+
+
+    public LevelRuntime(BackroomsGame game, int index, LevelDefinition definition, LevelLayout layout, Random rnd) {
+        this.game = game;
+        this.index = index;
+        this.definition = definition;
+        this.layout = layout;
+        this.rnd = rnd;
+    }
+
+    public static int baseY(int index) {
+        return TOP_BASE_Y - index * LEVEL_HEIGHT;
+    }
+
+    public int getBaseY() {
+        return baseY(this.index);
+    }
+
+    public int getIndex() {
+        return this.index;
+    }
+
+    public LevelDefinition getDefinition() {
+        return this.definition;
+    }
+
+    public LevelLayout getLayout() {
+        return this.layout;
+    }
+
+    public Random getRnd() {
+        return this.rnd;
+    }
+
+    public List<BackroomsMonster> getMonsters() {
+        return this.monsters;
+    }
+
+    public boolean isBlackoutActive() {
+        return this.blackoutActive;
+    }
+
+    public void setBlackoutActive(boolean blackoutActive) {
+        this.blackoutActive = blackoutActive;
+    }
+
+
+    public List<Player> playersInLevel() {
+        return this.game.playersInLevel(this.index);
+    }
+
+    /** Spieler-Position (Zellenmitte) fuer eine Layout-Zelle dieses Levels */
+    public Pos toPlayerPos(int[] cell) {
+        return this.layout.worldCenter(cell, this.getBaseY());
+    }
+
+    public Pos randomSpawn() {
+        return this.toPlayerPos(this.layout.randomSpawnCell(this.rnd));
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/LevelType.java

@@ -0,0 +1,25 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level;
+
+/**
+ * Alle implementierten Backrooms-Level. LOBBY ist immer das Startlevel,
+ * FINALE immer das letzte; der Pool dazwischen steht in BackroomsGame.LEVEL_POOL.
+ */
+public enum LevelType {
+    LOBBY("level_lobby"),
+    HABITABLE_ZONE("level_habitable"),
+    PIPE_DREAMS("level_pipeDreams"),
+    POOLROOMS("level_poolrooms"),
+    LIGHTS_OUT("level_lightsOut"),
+    FUN("level_fun"),
+    FINALE("level_finale");
+
+    private final String translationKey;
+
+    LevelType(String translationKey) {
+        this.translationKey = translationKey;
+    }
+
+    public String translationKey() {
+        return "game_Backrooms#" + this.translationKey;
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/TransitionType.java

@@ -0,0 +1,15 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level;
+
+/**
+ * Art des Level-Ausgangs an der Exit-Zelle.
+ */
+public enum TransitionType {
+    /** Loch im Boden: offener Schacht, der Spieler faellt physisch ins naechste Level */
+    HOLE,
+    /** Leiter-Schacht nach unten */
+    LADDER,
+    /** flackernder "Glitch"-Boden: Betreten teleportiert */
+    GLITCH_FLOOR,
+    /** Finale: Ziel-Region erreichen = entkommen */
+    ESCAPE
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/impl/Cells.java

@@ -0,0 +1,113 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.generator.MazeAlgorithms;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+import java.util.function.BiPredicate;
+
+/**
+ * Gemeinsame Zellen-Hilfen der Level-Implementierungen: Monster-Platzierung fern
+ * der Spawns und Schutz reservierter Zellen (Spawns, Kisten, Schluessel-Kiste).
+ */
+final class Cells {
+    private static final int MONSTER_MIN_SPAWN_DISTANCE = 10;
+
+    private Cells() {
+    }
+
+    /**
+     * Zufaellige begehbare Zellen mit Mindestabstand (> 10 Zellen) zu allen Spawns;
+     * der Abstand wird schrittweise gesenkt, falls sich sonst zu wenige Zellen finden.
+     */
+    static List<int[]> farWalkable(LevelLayout layout, Random rnd, int count) {
+        return far(layout, rnd, count, (x, z) -> true);
+    }
+
+    /**
+     * Flaechen-Faktor fuer Monsteranzahlen: grosse Karten (mehr Spieler) brauchen
+     * proportional mehr Monster, sonst wirken sie leer.
+     */
+    static int areaScale(LevelLayout layout) {
+        return Math.max(1, layout.getCells() / 16);
+    }
+
+    /** Wie {@link #farWalkable}, zusaetzlich gefiltert; liefert notfalls weniger als count Zellen. */
+    static List<int[]> far(LevelLayout layout, Random rnd, int count, BiPredicate<Integer, Integer> filter) {
+        for(int minDistance = MONSTER_MIN_SPAWN_DISTANCE; ; minDistance -= 2) {
+            List<int[]> candidates = new ArrayList<>();
+            for(int x = 0; x < layout.getCells(); x++) {
+                for(int z = 0; z < layout.getCells(); z++) {
+                    if(!layout.isWalkable(x, z) || !filter.test(x, z)) continue;
+                    if(distanceToSpawns(layout, x, z) > minDistance) candidates.add(new int[]{x, z});
+                }
+            }
+            if(candidates.size() >= count || minDistance <= 0) {
+                // Paarweiser Mindestabstand, damit die Monster nicht am selben Fleck stehen
+                double spread = Math.max(4, layout.getCells() / 8.0);
+                return MazeAlgorithms.sampleSpread(candidates, rnd, count, spread);
+            }
+        }
+    }
+
+    static double distanceToSpawns(LevelLayout layout, int cx, int cz) {
+        double min = Double.MAX_VALUE;
+        for(int[] spawn : layout.getSpawnCells()) {
+            double dx = cx - spawn[0];
+            double dz = cz - spawn[1];
+            min = Math.min(min, Math.sqrt(dx * dx + dz * dz));
+        }
+        return min;
+    }
+
+    /** Zelle ist als Spawn, Kiste oder Schluessel-Kiste reserviert und darf nicht ueberbaut werden. */
+    static boolean reserved(LevelLayout layout, int cx, int cz) {
+        int[] keyChest = layout.getKeyChestCell();
+        return contains(layout.getSpawnCells(), cx, cz)
+            || contains(layout.getChestCells(), cx, cz)
+            || (keyChest != null && keyChest[0] == cx && keyChest[1] == cz);
+    }
+
+    static boolean contains(List<int[]> cells, int cx, int cz) {
+        for(int[] cell : cells) {
+            if(cell[0] == cx && cell[1] == cz) return true;
+        }
+        return false;
+    }
+
+    static int openOrthogonal(LevelLayout layout, int cx, int cz) {
+        int open = 0;
+        if(layout.isWalkable(cx + 1, cz)) open++;
+        if(layout.isWalkable(cx - 1, cz)) open++;
+        if(layout.isWalkable(cx, cz + 1)) open++;
+        if(layout.isWalkable(cx, cz - 1)) open++;
+        return open;
+    }
+
+    static void removeLight(LevelLayout layout, int cx, int cz) {
+        layout.getLightCells().removeIf(cell -> cell[0] == cx && cell[1] == cz);
+    }
+
+    /**
+     * Stempelt kreisfoermige Dunkelzonen ins Layout und entfernt dort die Beleuchtung.
+     */
+    static void darkBlobs(LevelLayout layout, Random rnd, int count, int minRadius, int maxRadius) {
+        int cells = layout.getCells();
+        for(int i = 0; i < count; i++) {
+            int centerX = 3 + rnd.nextInt(Math.max(1, cells - 6));
+            int centerZ = 3 + rnd.nextInt(Math.max(1, cells - 6));
+            int radius = minRadius + rnd.nextInt(Math.max(1, maxRadius - minRadius + 1));
+            for(int x = centerX - radius; x <= centerX + radius; x++) {
+                for(int z = centerZ - radius; z <= centerZ + radius; z++) {
+                    if(!layout.inBounds(x, z)) continue;
+                    double dx = x - centerX;
+                    double dz = z - centerZ;
+                    if(Math.sqrt(dx * dx + dz * dz) <= radius) layout.setDark(x, z, true);
+                }
+            }
+        }
+        layout.getLightCells().removeIf(cell -> layout.isDarkCell(cell[0], cell[1]));
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/impl/Level0Lobby.java

@@ -0,0 +1,151 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience.AmbienceProfile;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.generator.MazeAlgorithms;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelDefinition;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelPalette;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.TransitionType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Bacteria;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.BackroomsMonster;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Hound;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Smiler;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.sound.SoundEvent;
+
+import java.util.List;
+import java.util.Random;
+
+/**
+ * Level 0 "The Lobby": endlose Raumfluchten im Stil des urspruenglichen Prototyps —
+ * duenne Sandsteinwaende mit Tuerluecken im Raster, heller Wollteppich, summende
+ * Deckenlampen, dazu dunkle Blackout-Zonen mit lauernden Smilern.
+ * Ausgang: Loch im Boden hinter einer verschlossenen Tuer.
+ */
+public class Level0Lobby extends LevelDefinition {
+    // Palette nach dem urspruenglichen Prototyp: heller Wollboden, Smooth Sandstone,
+    // Sea Lanterns im Deckenraster, gemeisselte Sandstein-Eckpfosten
+    private static final LevelPalette PALETTE = new LevelPalette(
+        List.of(Block.LIGHT_GRAY_WOOL, Block.LIGHT_GRAY_WOOL, Block.LIGHT_GRAY_WOOL, Block.BROWN_WOOL),
+        List.of(Block.SMOOTH_SANDSTONE, Block.SMOOTH_SANDSTONE, Block.SMOOTH_SANDSTONE, Block.SANDSTONE),
+        List.of(Block.SMOOTH_STONE, Block.SMOOTH_STONE, Block.STONE),
+        Block.SEA_LANTERN,
+        Block.CHISELED_SANDSTONE,
+        3,
+        Block.SMOOTH_SANDSTONE,
+        false,
+        List.of(Block.COBWEB),
+        0.008,
+        List.of(),
+        0
+    );
+
+    /** Rasterweite des Prototyp-Wandmusters (in Zellen) */
+    private static final int SEGMENT_GRID = 3;
+
+    @Override
+    public LevelType type() {
+        return LevelType.LOBBY;
+    }
+
+    /**
+     * Generierung nach dem urspruenglichen Prototyp: offene Flaeche, in die ein
+     * 4-Zellen-Raster aus duennen Sandsteinwand-Segmenten mit zufaelligen
+     * Tuerluecken und Eckpfosten gelegt wird — statt eines Gaenge-Labyrinths.
+     */
+    @Override
+    public LevelLayout buildLayout(Random rnd, int cells, int playerCount) {
+        LevelLayout layout = new LevelLayout(cells);
+        MazeAlgorithms.openField(layout);
+
+        // Eckpfosten an den Rasterpunkten
+        for(int gx = SEGMENT_GRID; gx < cells - 1; gx += SEGMENT_GRID) {
+            for(int gz = SEGMENT_GRID; gz < cells - 1; gz += SEGMENT_GRID) {
+                layout.setCell(gx, gz, LevelLayout.Cell.THIN_PILLAR);
+
+                // je Richtung: ~83% vorhanden, davon die Haelfte mit Tuerluecke
+                this.carveSegment(layout, rnd, gx, gz, true);
+                this.carveSegment(layout, rnd, gx, gz, false);
+            }
+        }
+
+        this.finalizeLayout(layout, rnd, playerCount, 2);
+
+        // Blackout-Zonen: dunkle Flecken, in denen die Deckenbeleuchtung fehlt
+        Cells.darkBlobs(layout, rnd, 2 + rnd.nextInt(3), 3, 6);
+
+        return layout;
+    }
+
+
+    /** Ein Wandsegment vom Rasterpunkt aus entlang +x bzw. +z, mit optionaler Tuerluecke. */
+    private void carveSegment(LevelLayout layout, Random rnd, int gx, int gz, boolean alongX) {
+        if(rnd.nextInt(6) == 0) return;
+        int cells = layout.getCells();
+        int gap = rnd.nextInt(2) == 0 ? 1 + rnd.nextInt(SEGMENT_GRID - 1) : -1;
+        for(int step = 1; step < SEGMENT_GRID; step++) {
+            int x = alongX ? gx + step : gx;
+            int z = alongX ? gz : gz + step;
+            if((alongX ? x : z) >= cells - 1 || step == gap) continue;
+            if(layout.cellAt(x, z) == LevelLayout.Cell.FLOOR) {
+                layout.setCell(x, z, alongX ? LevelLayout.Cell.THIN_WALL_X : LevelLayout.Cell.THIN_WALL_Z);
+            }
+        }
+    }
+
+    @Override
+    public LevelPalette palette() {
+        return PALETTE;
+    }
+
+    @Override
+    public TransitionType transitionType() {
+        return TransitionType.HOLE;
+    }
+
+    @Override
+    public boolean usesKeyDoor() {
+        return true;
+    }
+
+    /** Smiler lauern in den Blackout-Zonen; vereinzelt steht eine Bacteria als "Wand" herum. */
+    @Override
+    public void populateMonsters(BackroomsGame game, LevelRuntime runtime, int density) {
+        LevelLayout layout = runtime.getLayout();
+        for(int[] cell : Cells.far(layout, runtime.getRnd(), density * Cells.areaScale(layout), layout::isDarkCell)) {
+            Smiler smiler = new Smiler(runtime);
+            smiler.spawnAtCell(game, cell);
+            runtime.getMonsters().add(smiler);
+        }
+        for(int[] cell : Cells.farWalkable(layout, runtime.getRnd(), Math.max(1, density - 1))) {
+            Bacteria bacteria = new Bacteria(runtime);
+            bacteria.spawnAtCell(game, cell);
+            runtime.getMonsters().add(bacteria);
+        }
+    }
+
+    /** Nachschub: Smiler in Dunkelzonen, in den hellen Fluren selten Hound oder Bacteria. */
+    @Override
+    public BackroomsMonster createRoamingMonster(LevelRuntime runtime, int[] cell) {
+        if(runtime.getLayout().isDarkCell(cell[0], cell[1])) return new Smiler(runtime);
+        int roll = runtime.getRnd().nextInt(100);
+        if(roll < 20) return new Hound(runtime);
+        if(roll < 35) return new Bacteria(runtime);
+        return null;
+    }
+
+    @Override
+    public AmbienceProfile ambience() {
+        return new AmbienceProfile(
+            SoundEvent.BLOCK_BEACON_AMBIENT,
+            0.15f,
+            0.5f,
+            8,
+            List.of(SoundEvent.AMBIENT_CAVE, SoundEvent.BLOCK_WOODEN_DOOR_OPEN, SoundEvent.BLOCK_STONE_STEP),
+            0.015
+        );
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/impl/LevelFinale.java

@@ -0,0 +1,368 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience.AmbienceProfile;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.generator.MazeAlgorithms;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelDefinition;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelPalette;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.TransitionType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.BackroomsMonster;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Deathmoth;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Hound;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Partygoer;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience.Jumpscare;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Smiler;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Wretch;
+import eu.mhsl.minenet.minigames.message.type.ActionBarMessage;
+import eu.mhsl.minenet.minigames.message.type.TitleMessage;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsPlayer;
+import net.kyori.adventure.sound.Sound;
+import net.kyori.adventure.text.Component;
+import net.minestom.server.entity.Player;
+import net.minestom.server.entity.damage.DamageType;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.sound.SoundEvent;
+
+import java.time.Duration;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+import java.util.Random;
+
+/**
+ * Level ! "Run For Your Life": ein langer Krankenhauskorridor. Hinter den Spielern
+ * frisst sich eine toedliche Zone mit steigendem Tempo den Gang entlang — wer das
+ * Ende erreicht, ist entkommen und gewinnt.
+ */
+public class LevelFinale extends LevelDefinition {
+    private static final int CORRIDOR_CELLS = 67;
+    /** Vorsprung in Sekunden, bevor Meute und Todeszone losgelassen werden */
+    private static final int HEAD_START_SECONDS = 12;
+    /** Wer diese Distanz vor dem Ende des Countdowns laeuft, loest seine Jagd sofort aus */
+    private static final double RELEASE_DISTANCE = 12;
+    private static final double ZONE_BASE_SPEED = 1.2;
+    private static final double ZONE_ACCELERATION = 0.04;
+    private static final double ZONE_MAX_SPEED = 4.5;
+
+    /** Sekunden Dunkelheit, bevor der Duell-Smiler erscheint */
+    private static final int CHALLENGE_DELAY_SECONDS = 4;
+
+    private final List<int[]> challengeRooms = new ArrayList<>();
+    private final Map<UUID, Integer> challengeTimers = new HashMap<>();
+    private final Map<UUID, Smiler> challengeSmilers = new HashMap<>();
+
+    private static final LevelPalette PALETTE = new LevelPalette(
+        List.of(Block.WHITE_CONCRETE, Block.WHITE_CONCRETE, Block.LIGHT_GRAY_CONCRETE),
+        List.of(Block.WHITE_CONCRETE, Block.QUARTZ_BLOCK, Block.QUARTZ_BLOCK),
+        List.of(Block.LIGHT_GRAY_CONCRETE),
+        Block.SEA_LANTERN,
+        Block.QUARTZ_PILLAR,
+        4,
+        Block.LIGHT_BLUE_CONCRETE,
+        false,
+        List.of(Block.COBWEB),
+        0.02,
+        List.of(),
+        0
+    );
+
+    @Override
+    public LevelType type() {
+        return LevelType.FINALE;
+    }
+
+    @Override
+    public LevelLayout buildLayout(Random rnd, int cells, int playerCount) {
+        LevelLayout layout = new LevelLayout(CORRIDOR_CELLS);
+
+        // Korridorbreite skaliert mit der Spielerzahl (2 Zellen = 6 Bloecke bis 8 Zellen = 24)
+        int widthCells = Math.clamp(2 + playerCount / 8, 2, 8);
+        int zStart = (CORRIDOR_CELLS - widthCells) / 2;
+
+        for(int x = 1; x < CORRIDOR_CELLS - 1; x++) {
+            for(int z = zStart; z < zStart + widthCells; z++) {
+                layout.setCell(x, z, LevelLayout.Cell.FLOOR);
+            }
+        }
+
+        // Hindernisse: einzelne Pfeiler-Zellen im Laufweg
+        for(int x = 8; x < CORRIDOR_CELLS - 6; x += 3 + rnd.nextInt(4)) {
+            int z = zStart + rnd.nextInt(widthCells);
+            layout.setCell(x, z, LevelLayout.Cell.PILLAR);
+        }
+
+        // Alle Spieler starten am linken Ende
+        for(int z = zStart; z < zStart + widthCells; z++) {
+            layout.getSpawnCells().add(new int[]{2, z});
+            layout.getSpawnCells().add(new int[]{3, z});
+        }
+
+        // Nur der Korridor + Kammern wird generiert — nicht die ~90 % toten WALL-Zellen des Rasters
+        layout.setGenerationBounds(0, CORRIDOR_CELLS - 1, zStart - 6, zStart + widthCells + 5);
+
+        layout.setExitCell(new int[]{CORRIDOR_CELLS - 2, zStart + widthCells / 2});
+        layout.setCell(CORRIDOR_CELLS - 2, zStart + widthCells / 2, LevelLayout.Cell.EXIT);
+
+        // Pickups (Energy Bars/Almond Water) entlang der Strecke
+        List<int[]> floorCells = new ArrayList<>();
+        for(int x = 6; x < CORRIDOR_CELLS - 4; x++) {
+            for(int z = zStart; z < zStart + widthCells; z++) {
+                if(layout.cellAt(x, z) == LevelLayout.Cell.FLOOR) floorCells.add(new int[]{x, z});
+            }
+        }
+        layout.getChestCells().addAll(MazeAlgorithms.sampleSpread(floorCells, rnd, 8, 6));
+
+        // Sparsame Beleuchtung in der Gangmitte
+        for(int x = 4; x < CORRIDOR_CELLS - 2; x += 5) {
+            layout.getLightCells().add(new int[]{x, zStart + widthCells / 2});
+        }
+
+        // Seitentueren zu dunklen Duell-Kammern: wer (mit Key) eintritt und den
+        // dort spawnenden Smiler toetet, entkommt ebenfalls
+        int doors = 3 + rnd.nextInt(3);
+        for(int i = 0; i < doors; i++) {
+            int x = 10 + i * (CORRIDOR_CELLS - 20) / doors + rnd.nextInt(4);
+            boolean north = rnd.nextBoolean();
+            int wallZ = north ? zStart - 1 : zStart + widthCells;
+            int direction = north ? -1 : 1;
+            if(!layout.inBounds(x, wallZ + direction * 3)) continue;
+            if(layout.cellAt(x, wallZ) != LevelLayout.Cell.WALL) continue;
+
+            layout.setCell(x, wallZ, LevelLayout.Cell.DOOR);
+            for(int dx = -1; dx <= 1; dx++) {
+                for(int step = 1; step <= 3; step++) {
+                    int roomZ = wallZ + direction * step;
+                    if(!layout.inBounds(x + dx, roomZ)) continue;
+                    layout.setCell(x + dx, roomZ, LevelLayout.Cell.FLOOR);
+                    layout.setDark(x + dx, roomZ, true);
+                }
+            }
+            // {RaumzentrumX, RaumzentrumZ, TuerzellenX, TuerzellenZ}
+            this.challengeRooms.add(new int[]{x, wallZ + direction * 2, x, wallZ});
+        }
+
+        return layout;
+    }
+
+    /**
+     * Verschliesst die Kammertuer endgueltig: Tuerbloecke zurueck, Zelle wird Wand —
+     * der DoorManager oeffnet sie nie wieder, die Meute bleibt draussen.
+     */
+    private void sealDoor(BackroomsGame game, LevelRuntime runtime, int[] room) {
+        LevelLayout layout = runtime.getLayout();
+        int doorCx = room[2];
+        int doorCz = room[3];
+        if(layout.cellAt(doorCx, doorCz) == LevelLayout.Cell.WALL) return;
+
+        int doorX = layout.worldX(doorCx) + 1;
+        int doorZ = layout.worldZ(doorCz) + 1;
+        game.setBlock(doorX, runtime.getBaseY() + 2, doorZ, Block.IRON_DOOR.withProperties(Map.of("half", "lower", "facing", "north")));
+        game.setBlock(doorX, runtime.getBaseY() + 3, doorZ, Block.IRON_DOOR.withProperties(Map.of("half", "upper", "facing", "north")));
+        layout.setCell(doorCx, doorCz, LevelLayout.Cell.WALL);
+
+        game.playSound(Sound.sound(SoundEvent.BLOCK_IRON_DOOR_CLOSE, Sound.Source.BLOCK, 1.2f, 0.6f),
+            doorX, runtime.getBaseY() + 2, doorZ);
+    }
+
+    /** Zentrum der Duell-Kammer, in der der Spieler gerade steht — oder null. */
+    private int[] challengeRoomAt(LevelLayout layout, Player player) {
+        int cx = layout.cellX(player.getPosition().x());
+        int cz = layout.cellZ(player.getPosition().z());
+        for(int[] center : this.challengeRooms) {
+            if(Math.abs(cx - center[0]) <= 1 && Math.abs(cz - center[1]) <= 1) return center;
+        }
+        return null;
+    }
+
+    @Override
+    public LevelPalette palette() {
+        return PALETTE;
+    }
+
+    @Override
+    public TransitionType transitionType() {
+        return TransitionType.ESCAPE;
+    }
+
+    /** Schaltet die 10%-Key-Chance der Strecken-Barrels frei (fuer die Duell-Tueren). */
+    @Override
+    public boolean usesKeyDoor() {
+        return true;
+    }
+
+    @Override
+    public boolean opensSingleDoors() {
+        return true;
+    }
+
+    /**
+     * Jeder Spieler hat seine EIGENE Verfolgungsjagd: eigener Countdown, eigene Zone,
+     * eigene Meute. Freigabe entweder nach dem Vorsprungs-Countdown oder frueher,
+     * sobald der Spieler die ersten Meter gelaufen ist. Nachzuegler und Respawns
+     * starten dadurch immer fair mit eigenem Vorsprung.
+     */
+    @Override
+    public void onLevelTick(BackroomsGame game, LevelRuntime runtime) {
+        LevelLayout layout = runtime.getLayout();
+        double startX = layout.worldX(2);
+
+        for(Player player : runtime.playersInLevel()) {
+            BackroomsPlayer state = game.playerState(player);
+            if(state == null) continue;
+
+            // Ankunft: Sirene, Countdown beginnt
+            if(state.getFinaleSeconds() == BackroomsPlayer.FINALE_NOT_STARTED) {
+                state.setFinaleSeconds(-HEAD_START_SECONDS);
+                player.playSound(Sound.sound(SoundEvent.EVENT_RAID_HORN, Sound.Source.HOSTILE, 1f, 0.8f), Sound.Emitter.self());
+                continue;
+            }
+
+            int seconds = state.getFinaleSeconds() + 1;
+            state.setFinaleSeconds(seconds);
+
+            if(seconds < 0) {
+                // Wer schon losgelaufen ist, loest seine Jagd sofort aus
+                if(player.getPosition().x() > startX + RELEASE_DISTANCE) {
+                    seconds = 0;
+                    state.setFinaleSeconds(0);
+                } else {
+                    new ActionBarMessage()
+                        .appendTranslated("game_Backrooms#finaleCountdown")
+                        .appendStatic(Component.text(" " + (-seconds)))
+                        .send(player);
+                    player.playSound(Sound.sound(SoundEvent.BLOCK_NOTE_BLOCK_HAT, Sound.Source.AMBIENT, 1f, 1f), Sound.Emitter.self());
+                    continue;
+                }
+            }
+
+            // Freigabe: "RENN!", persoenliche Meute hinter dem Spieler, Zone startet
+            if(seconds == 0) {
+                player.playSound(Sound.sound(SoundEvent.ENTITY_GENERIC_EXPLODE, Sound.Source.HOSTILE, 1.5f, 0.5f), Sound.Emitter.self());
+                new TitleMessage(Duration.ofSeconds(2)).appendTranslated("game_Backrooms#finaleRun").send(player);
+                state.setFinaleZoneX(Math.max(layout.worldX(0), player.getPosition().x() - 14));
+                this.spawnPackBehind(game, runtime, player);
+                continue;
+            }
+
+            // In einer Duell-Kammer pausiert die persoenliche Zone — dort zaehlt nur der Smiler
+            if(this.tickChallenge(game, runtime, player)) continue;
+
+            double speed = Math.min(ZONE_MAX_SPEED, ZONE_BASE_SPEED + seconds * ZONE_ACCELERATION);
+            state.setFinaleZoneX(state.getFinaleZoneX() + speed);
+
+            if(seconds % 2 == 0) {
+                player.playSound(Sound.sound(SoundEvent.BLOCK_NOTE_BLOCK_PLING, Sound.Source.AMBIENT, 1f, 2f), Sound.Emitter.self());
+            }
+            double distance = player.getPosition().x() - state.getFinaleZoneX();
+            if(distance < 0) {
+                player.damage(DamageType.MOB_ATTACK, 3);
+                player.playSound(Sound.sound(SoundEvent.ENTITY_WARDEN_ATTACK_IMPACT, Sound.Source.HOSTILE, 1f, 0.7f), Sound.Emitter.self());
+            } else if(distance < 15) {
+                player.playSound(Sound.sound(SoundEvent.ENTITY_WARDEN_HEARTBEAT, Sound.Source.HOSTILE, 1.2f, 0.8f), Sound.Emitter.self());
+            }
+        }
+    }
+
+    /**
+     * Duell-Kammer: nach kurzer Dunkelheit erscheint ein an den Spieler gebundener
+     * Smiler — wer ihn toetet, ist entkommen.
+     *
+     * @return true, wenn der Spieler gerade im Duell steckt (Zone pausiert dann)
+     */
+    private boolean tickChallenge(BackroomsGame game, LevelRuntime runtime, Player player) {
+        // Sieg-Check unabhaengig vom Aufenthaltsort
+        Smiler smiler = this.challengeSmilers.get(player.getUuid());
+        if(smiler != null && (smiler.isDead() || smiler.isRemoved())) {
+            this.challengeSmilers.remove(player.getUuid());
+            game.escape(player);
+            return true;
+        }
+
+        LevelLayout layout = runtime.getLayout();
+        int[] room = this.challengeRoomAt(layout, player);
+        if(room == null) {
+            this.challengeTimers.remove(player.getUuid());
+            return false;
+        }
+
+        if(smiler != null) return true;
+
+        Integer timer = this.challengeTimers.get(player.getUuid());
+        if(timer == null) {
+            this.challengeTimers.put(player.getUuid(), CHALLENGE_DELAY_SECONDS);
+            // Die Tuer faellt hinter dir zu — und geht nie wieder auf
+            this.sealDoor(game, runtime, room);
+            player.playSound(Sound.sound(SoundEvent.BLOCK_SCULK_SHRIEKER_SHRIEK, Sound.Source.HOSTILE, 0.8f, 0.5f), Sound.Emitter.self());
+            return true;
+        }
+
+        if(timer > 1) {
+            this.challengeTimers.put(player.getUuid(), timer - 1);
+            player.playSound(Sound.sound(SoundEvent.ENTITY_WARDEN_HEARTBEAT, Sound.Source.HOSTILE, 0.8f, 0.6f), Sound.Emitter.self());
+            return true;
+        }
+
+        // Das Grinsen erscheint
+        this.challengeTimers.remove(player.getUuid());
+        Smiler duelSmiler = new Smiler(runtime);
+        duelSmiler.setBoundPlayer(player);
+        duelSmiler.spawnAtCell(game, room);
+        runtime.getMonsters().add(duelSmiler);
+        this.challengeSmilers.put(player.getUuid(), duelSmiler);
+        Jumpscare.visual(player, game);
+        return true;
+    }
+
+    /** Gemischte 3er-Meute wenige Zellen hinter dem Spieler. */
+    private void spawnPackBehind(BackroomsGame game, LevelRuntime runtime, Player player) {
+        LevelLayout layout = runtime.getLayout();
+        int playerCx = layout.cellX(player.getPosition().x());
+        int playerCz = layout.cellZ(player.getPosition().z());
+
+        int spawned = 0;
+        List<int[]> used = new ArrayList<>();
+        for(int attempt = 0; attempt < 12 && spawned < 3; attempt++) {
+            // Wer noch am Korridoranfang steht, hat kein "Hinten" — dann spawnt die
+            // Meute in der ersten begehbaren Spalte direkt hinter bzw. neben ihm
+            int cx = Math.max(1, playerCx - 2 - runtime.getRnd().nextInt(4));
+            int cz = playerCz + runtime.getRnd().nextInt(5) - 2;
+            if(!layout.isWalkable(cx, cz)) continue;
+            // jede Meute verteilt auf unterschiedliche Zellen
+            int finalCx = cx;
+            int finalCz = cz;
+            if(used.stream().anyMatch(cell -> cell[0] == finalCx && cell[1] == finalCz)) continue;
+            used.add(new int[]{cx, cz});
+
+            BackroomsMonster monster = switch(runtime.getRnd().nextInt(5)) {
+                case 0 -> new Partygoer(runtime);
+                case 1 -> new Wretch(runtime);
+                case 2 -> new Deathmoth(runtime);
+                default -> new Hound(runtime);
+            };
+            monster.setRoaming(true);
+            monster.setRelentless(true);
+            monster.setBoundPlayer(player);
+            monster.spawnAtCell(game, new int[]{cx, cz});
+            runtime.getMonsters().add(monster);
+            spawned++;
+        }
+    }
+
+    @Override
+    public AmbienceProfile ambience() {
+        return new AmbienceProfile(
+            SoundEvent.ENTITY_WARDEN_HEARTBEAT,
+            0.6f,
+            1f,
+            4,
+            List.of(SoundEvent.ENTITY_WARDEN_NEARBY_CLOSE, SoundEvent.ENTITY_GHAST_SCREAM),
+            0.05
+        );
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/impl/LevelFun.java

@@ -0,0 +1,109 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience.AmbienceProfile;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelDefinition;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelPalette;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.TransitionType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.BackroomsMonster;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Partygoer;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.sound.SoundEvent;
+
+import java.util.List;
+import java.util.Random;
+
+/**
+ * Level Fun "=)": eine endlose Kinderparty in grellen Farben, mit kaputter
+ * Partymusik aus der Deckenanlage. Die Partygoer streifen in Rudeln umher
+ * und wollen, dass man FUER IMMER bleibt.
+ */
+public class LevelFun extends LevelDefinition {
+    private static final LevelPalette PALETTE = new LevelPalette(
+        List.of(Block.LIGHT_BLUE_WOOL, Block.CYAN_WOOL),
+        List.of(Block.ORANGE_CONCRETE, Block.ORANGE_TERRACOTTA, Block.YELLOW_CONCRETE),
+        List.of(Block.WHITE_CONCRETE),
+        Block.GLOWSTONE,
+        Block.MAGENTA_CONCRETE,
+        4,
+        Block.LIME_CONCRETE,
+        true,
+        List.of(Block.CAKE),
+        0.012,
+        List.of(),
+        0
+    );
+
+    @Override
+    public LevelType type() {
+        return LevelType.FUN;
+    }
+
+    @Override
+    public LevelLayout buildLayout(Random rnd, int cells, int playerCount) {
+        return this.standardLayout(rnd, cells, playerCount, 0.7, cells / 2, 7, 3);
+    }
+
+    @Override
+    public LevelPalette palette() {
+        return PALETTE;
+    }
+
+    @Override
+    public TransitionType transitionType() {
+        return TransitionType.GLITCH_FLOOR;
+    }
+
+    @Override
+    public boolean usesKeyDoor() {
+        return true;
+    }
+
+    /** Partygoer treten in Rudeln von 3-4 auf, jedes Rudel gemeinsam an einer Zelle. */
+    @Override
+    public void populateMonsters(BackroomsGame game, LevelRuntime runtime, int density) {
+        Random rnd = runtime.getRnd();
+        LevelLayout layout = runtime.getLayout();
+        for(int[] cell : Cells.farWalkable(layout, rnd, density * Cells.areaScale(layout))) {
+            int packSize = 3 + rnd.nextInt(2);
+            for(int i = 0; i < packSize; i++) {
+                // Rudel bleibt zusammen, aber jedes Mitglied auf einer eigenen Nachbarzelle
+                int cx = cell[0];
+                int cz = cell[1];
+                for(int attempt = 0; attempt < 6; attempt++) {
+                    int nx = cell[0] + rnd.nextInt(3) - 1;
+                    int nz = cell[1] + rnd.nextInt(3) - 1;
+                    if(layout.isWalkable(nx, nz)) {
+                        cx = nx;
+                        cz = nz;
+                        break;
+                    }
+                }
+                Partygoer partygoer = new Partygoer(runtime);
+                partygoer.spawnAtCell(game, new int[]{cx, cz});
+                runtime.getMonsters().add(partygoer);
+            }
+        }
+    }
+
+    /** "You can never catch a Partygoer alone" — der Nachschub kommt zu den Rudeln dazu. */
+    @Override
+    public BackroomsMonster createRoamingMonster(LevelRuntime runtime, int[] cell) {
+        return new Partygoer(runtime);
+    }
+
+    @Override
+    public AmbienceProfile ambience() {
+        return new AmbienceProfile(
+            SoundEvent.BLOCK_NOTE_BLOCK_BIT,
+            0.6f,
+            1.4f,
+            6,
+            List.of(SoundEvent.ENTITY_VILLAGER_CELEBRATE, SoundEvent.ENTITY_FIREWORK_ROCKET_LAUNCH, SoundEvent.BLOCK_CAKE_ADD_CANDLE),
+            0.04
+        );
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/impl/LevelHabitableZone.java

@@ -0,0 +1,146 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience.AmbienceProfile;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelDefinition;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelPalette;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.TransitionType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Bacteria;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.BackroomsMonster;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Hound;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Wretch;
+import net.kyori.adventure.sound.Sound;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.sound.SoundEvent;
+
+import java.util.List;
+import java.util.Random;
+
+/**
+ * Level 1 "Habitable Zone": Parkhaus-/Lagerhallen-Atmosphaere aus grauem Beton.
+ * Grosse offene Flaechen mit regelmaessigen Stuetzpfeilern und vereinzelten
+ * Wasserpfuetzen. Event "The Flickering": kurze, zufaellige Komplett-Blackouts.
+ */
+public class LevelHabitableZone extends LevelDefinition {
+    private int blackoutSecondsLeft = 0;
+    private static final double FLICKERING_CHANCE_PER_SECOND = 1.0 / 60.0;
+    private static final double PUDDLE_CHANCE = 0.02;
+
+    private static final LevelPalette PALETTE = new LevelPalette(
+        List.of(Block.GRAY_CONCRETE, Block.STONE, Block.ANDESITE),
+        List.of(Block.STONE_BRICKS, Block.GRAY_CONCRETE, Block.CRACKED_STONE_BRICKS),
+        List.of(Block.GRAY_CONCRETE, Block.STONE),
+        Block.SEA_LANTERN,
+        Block.POLISHED_ANDESITE,
+        5,
+        Block.POLISHED_ANDESITE,
+        false,
+        List.of(Block.COBWEB),
+        0.006,
+        List.of(Block.IRON_CHAIN),
+        0.015
+    );
+
+    @Override
+    public LevelType type() {
+        return LevelType.HABITABLE_ZONE;
+    }
+
+    @Override
+    public LevelLayout buildLayout(Random rnd, int cells, int playerCount) {
+        LevelLayout layout = this.openLayout(rnd, cells, playerCount, cells / 2, 2);
+
+        // Stuetzpfeiler im 4er-Raster, nur mitten in Freiflaechen (Zelle + alle 4 Nachbarn frei)
+        for(int x = 2; x < cells - 2; x += 4) {
+            for(int z = 2; z < cells - 2; z += 4) {
+                if(layout.cellAt(x, z) != LevelLayout.Cell.FLOOR) continue;
+                if(layout.cellAt(x + 1, z) != LevelLayout.Cell.FLOOR) continue;
+                if(layout.cellAt(x - 1, z) != LevelLayout.Cell.FLOOR) continue;
+                if(layout.cellAt(x, z + 1) != LevelLayout.Cell.FLOOR) continue;
+                if(layout.cellAt(x, z - 1) != LevelLayout.Cell.FLOOR) continue;
+                if(Cells.reserved(layout, x, z)) continue;
+                layout.setCell(x, z, LevelLayout.Cell.PILLAR);
+                Cells.removeLight(layout, x, z);
+            }
+        }
+
+        // Vereinzelte Wasserpfuetzen auf dem Hallenboden
+        for(int x = 1; x < cells - 1; x++) {
+            for(int z = 1; z < cells - 1; z++) {
+                if(layout.cellAt(x, z) != LevelLayout.Cell.FLOOR) continue;
+                if(Cells.reserved(layout, x, z)) continue;
+                if(rnd.nextDouble() < PUDDLE_CHANCE) layout.setCell(x, z, LevelLayout.Cell.WATER);
+            }
+        }
+
+        return layout;
+    }
+
+    @Override
+    public LevelPalette palette() {
+        return PALETTE;
+    }
+
+    @Override
+    public TransitionType transitionType() {
+        return TransitionType.LADDER;
+    }
+
+    @Override
+    public void populateMonsters(BackroomsGame game, LevelRuntime runtime, int density) {
+        for(int[] cell : Cells.farWalkable(runtime.getLayout(), runtime.getRnd(), (1 + density) * Cells.areaScale(runtime.getLayout()))) {
+            Hound hound = new Hound(runtime);
+            hound.spawnAtCell(game, cell);
+            runtime.getMonsters().add(hound);
+        }
+        // Getarnte Bacteria zwischen den Betonpfeilern
+        for(int[] cell : Cells.farWalkable(runtime.getLayout(), runtime.getRnd(), density)) {
+            Bacteria bacteria = new Bacteria(runtime);
+            bacteria.spawnAtCell(game, cell);
+            runtime.getMonsters().add(bacteria);
+        }
+    }
+
+    /** Nachschub: meist Hounds, dazu Wretches und getarnte Bacteria. */
+    @Override
+    public BackroomsMonster createRoamingMonster(LevelRuntime runtime, int[] cell) {
+        int roll = runtime.getRnd().nextInt(100);
+        if(roll < 60) return new Hound(runtime);
+        if(roll < 85) return new Wretch(runtime);
+        return new Bacteria(runtime);
+    }
+
+    /** "The Flickering": zufaellig faellt fuer wenige Sekunden das komplette Licht aus. */
+    @Override
+    public void onLevelTick(BackroomsGame game, LevelRuntime runtime) {
+        Random rnd = runtime.getRnd();
+        if(!runtime.isBlackoutActive()) {
+            if(rnd.nextDouble() >= FLICKERING_CHANCE_PER_SECOND) return;
+            runtime.setBlackoutActive(true);
+            this.blackoutSecondsLeft = 5 + rnd.nextInt(4);
+            runtime.playersInLevel().forEach(player -> {
+                player.playSound(Sound.sound(SoundEvent.BLOCK_REDSTONE_TORCH_BURNOUT, Sound.Source.AMBIENT, 1f, 0.7f), Sound.Emitter.self());
+                player.playSound(Sound.sound(SoundEvent.BLOCK_LEVER_CLICK, Sound.Source.AMBIENT, 0.8f, 0.5f), Sound.Emitter.self());
+            });
+            return;
+        }
+
+        this.blackoutSecondsLeft--;
+        if(this.blackoutSecondsLeft <= 0) runtime.setBlackoutActive(false);
+    }
+
+    @Override
+    public AmbienceProfile ambience() {
+        return new AmbienceProfile(
+            SoundEvent.AMBIENT_BASALT_DELTAS_LOOP,
+            0.2f,
+            0.6f,
+            12,
+            List.of(SoundEvent.BLOCK_POINTED_DRIPSTONE_DRIP_WATER, SoundEvent.BLOCK_IRON_DOOR_CLOSE),
+            0.02
+        );
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/impl/LevelLightsOut.java

@@ -0,0 +1,110 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience.AmbienceProfile;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelDefinition;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelPalette;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.TransitionType;
+import net.kyori.adventure.sound.Sound;
+import net.minestom.server.coordinate.Pos;
+import net.minestom.server.entity.Player;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.sound.SoundEvent;
+
+import java.util.List;
+import java.util.Random;
+
+/**
+ * Level 6 "Lights Out": absolute Dunkelheit, keine einzige Lichtquelle, keine Monster —
+ * Level 6 ist gefaehrlich, weil NICHTS da ist. Navigation nur ueber einen periodischen
+ * Audio-Ping, der von der Exit-Position ausgeht.
+ */
+public class LevelLightsOut extends LevelDefinition {
+    private int pingSeconds = 0;
+    private static final int PING_PERIOD_SECONDS = 4;
+    private static final double HEARTBEAT_CHANCE = 0.25;
+
+    private static final LevelPalette PALETTE = new LevelPalette(
+        List.of(Block.SMOOTH_BASALT, Block.BLACK_CONCRETE, Block.SCULK),
+        List.of(Block.POLISHED_BLACKSTONE, Block.SMOOTH_BASALT),
+        List.of(Block.SMOOTH_BASALT),
+        Block.SEA_LANTERN,
+        Block.POLISHED_BLACKSTONE,
+        3,
+        Block.SCULK,
+        false,
+        List.of(Block.SCULK_SENSOR, Block.SCULK_SENSOR, Block.SCULK_CATALYST),
+        0.012,
+        List.of(),
+        0
+    );
+
+    @Override
+    public LevelType type() {
+        return LevelType.LIGHTS_OUT;
+    }
+
+    @Override
+    public LevelLayout buildLayout(Random rnd, int cells, int playerCount) {
+        LevelLayout layout = this.standardLayout(rnd, cells, playerCount, 0.25, cells / 4, 4, 1);
+
+        // Das gesamte Level liegt in Dunkelheit; saemtliche Deckenlichter entfallen
+        for(int x = 0; x < cells; x++) {
+            for(int z = 0; z < cells; z++) {
+                layout.setDark(x, z, true);
+            }
+        }
+        layout.getLightCells().clear();
+
+        return layout;
+    }
+
+    @Override
+    public boolean permanentDarkness() {
+        return true;
+    }
+
+    @Override
+    public LevelPalette palette() {
+        return PALETTE;
+    }
+
+    @Override
+    public TransitionType transitionType() {
+        return TransitionType.HOLE;
+    }
+
+    /** Audio-Navigation: alle 4 s ein positionsgebundener Shriek vom Exit aus. */
+    @Override
+    public void onLevelTick(BackroomsGame game, LevelRuntime runtime) {
+        this.pingSeconds++;
+        if(this.pingSeconds % PING_PERIOD_SECONDS != 0) return;
+
+        Pos exit = runtime.toPlayerPos(runtime.getLayout().getExitCell());
+        boolean heartbeat = runtime.getRnd().nextDouble() < HEARTBEAT_CHANCE;
+        for(Player player : runtime.playersInLevel()) {
+            player.playSound(
+                Sound.sound(SoundEvent.BLOCK_SCULK_SHRIEKER_SHRIEK, Sound.Source.AMBIENT, 1.5f, 1f),
+                exit.x(), exit.y(), exit.z()
+            );
+            if(heartbeat) {
+                player.playSound(Sound.sound(SoundEvent.ENTITY_WARDEN_HEARTBEAT, Sound.Source.AMBIENT, 0.3f, 0.9f), Sound.Emitter.self());
+            }
+        }
+    }
+
+    @Override
+    public AmbienceProfile ambience() {
+        return new AmbienceProfile(
+            SoundEvent.AMBIENT_CAVE,
+            0.4f,
+            0.7f,
+            20,
+            List.of(SoundEvent.BLOCK_SCULK_SENSOR_CLICKING, SoundEvent.ENTITY_WARDEN_NEARBY_CLOSE),
+            0.04
+        );
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/impl/LevelPipeDreams.java

@@ -0,0 +1,206 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience.AmbienceProfile;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.generator.MazeAlgorithms;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelDefinition;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelPalette;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.TransitionType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.BackroomsMonster;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Clump;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Deathmoth;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Hound;
+import net.kyori.adventure.sound.Sound;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.sound.SoundEvent;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+import java.util.Random;
+
+/**
+ * Level 2 "Pipe Dreams": enge, niedrige Industrietunnel voller Rohre und Maschinen.
+ * Fast reines Labyrinth mit verstreuten Maschinenbloecken. Event "Serienschaltung":
+ * regelmaessig faellt ein zusammenhaengendes Drittel der Deckenbeleuchtung aus.
+ */
+public class LevelPipeDreams extends LevelDefinition {
+    private static final double MACHINE_RATIO = 0.03;
+
+    /** aktuell ausgefallenes Licht-Segment (-1 = keins) und Restdauer */
+    private int failedSegment = -1;
+    private int eventSeconds = 0;
+    private static final int LIGHT_FAIL_PERIOD_SECONDS = 45;
+    private static final int LIGHT_FAIL_DURATION_SECONDS = 8;
+
+    private static final LevelPalette PALETTE = new LevelPalette(
+        List.of(Block.MUD_BRICKS, Block.PACKED_MUD),
+        List.of(Block.MUD_BRICKS, Block.DEEPSLATE_BRICKS, Block.BROWN_TERRACOTTA),
+        List.of(Block.DEEPSLATE_TILES),
+        Block.SHROOMLIGHT,
+        Block.OXIDIZED_COPPER,
+        3,
+        Block.EXPOSED_COPPER,
+        false,
+        List.of(Block.COBWEB, Block.IRON_BARS),
+        0.01,
+        List.of(Block.OXIDIZED_COPPER_CHAIN, Block.LANTERN.withProperty("hanging", "true")),
+        0.02
+    );
+
+    @Override
+    public LevelType type() {
+        return LevelType.PIPE_DREAMS;
+    }
+
+    @Override
+    public LevelLayout buildLayout(Random rnd, int cells, int playerCount) {
+        LevelLayout layout = this.standardLayout(rnd, cells, playerCount, 0.1, 2, 3, 2);
+
+        // "Maschinen": verstreute PILLAR-Zellen, aber nur wenn sie keine Wege abschneiden
+        List<int[]> floorCells = new ArrayList<>();
+        for(int x = 1; x < cells - 1; x++) {
+            for(int z = 1; z < cells - 1; z++) {
+                if(layout.cellAt(x, z) != LevelLayout.Cell.FLOOR || Cells.reserved(layout, x, z)) continue;
+                // Nie vor der Schluesseltuer oder an der Exit-Kammer: die DOOR-Zelle ist nicht
+                // begehbar, der disconnects-Check wuerde eine Blockade dort nicht bemerken
+                if(MazeAlgorithms.isChamberProtected(layout, x, z)) continue;
+                if(this.nextToDoor(layout, x, z)) continue;
+                floorCells.add(new int[]{x, z});
+            }
+        }
+        Collections.shuffle(floorCells, rnd);
+        int target = (int) Math.round(floorCells.size() * MACHINE_RATIO);
+        int placed = 0;
+        for(int[] cell : floorCells) {
+            if(placed >= target) break;
+            layout.setCell(cell[0], cell[1], LevelLayout.Cell.PILLAR);
+            if(this.disconnects(layout)) {
+                layout.setCell(cell[0], cell[1], LevelLayout.Cell.FLOOR);
+                continue;
+            }
+            Cells.removeLight(layout, cell[0], cell[1]);
+            placed++;
+        }
+
+        return layout;
+    }
+
+    private boolean nextToDoor(LevelLayout layout, int cx, int cz) {
+        return layout.cellAt(cx + 1, cz) == LevelLayout.Cell.DOOR
+            || layout.cellAt(cx - 1, cz) == LevelLayout.Cell.DOOR
+            || layout.cellAt(cx, cz + 1) == LevelLayout.Cell.DOOR
+            || layout.cellAt(cx, cz - 1) == LevelLayout.Cell.DOOR;
+    }
+
+    /** Prueft per BFS, ob alle begehbaren Zellen (ausser der abgeschlossenen Exit-Kammer) verbunden bleiben. */
+    private boolean disconnects(LevelLayout layout) {
+        int[][] distances = MazeAlgorithms.bfsDistances(layout, layout.getSpawnCells().getFirst());
+        for(int x = 0; x < layout.getCells(); x++) {
+            for(int z = 0; z < layout.getCells(); z++) {
+                if(!layout.isWalkable(x, z)) continue;
+                if(layout.cellAt(x, z) == LevelLayout.Cell.EXIT) continue;
+                if(distances[x][z] < 0) return true;
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public LevelPalette palette() {
+        return PALETTE;
+    }
+
+    @Override
+    public TransitionType transitionType() {
+        return TransitionType.GLITCH_FLOOR;
+    }
+
+    @Override
+    public boolean usesKeyDoor() {
+        return true;
+    }
+
+    @Override
+    public void populateMonsters(BackroomsGame game, LevelRuntime runtime, int density) {
+        LevelLayout layout = runtime.getLayout();
+
+        // Clumps lauern an Ecken (genau zwei orthogonal offene Richtungen)
+        List<int[]> corners = Cells.far(layout, runtime.getRnd(), (2 + density) * Cells.areaScale(layout), (x, z) -> Cells.openOrthogonal(layout, x, z) == 2);
+        for(int[] cell : corners) {
+            Clump clump = new Clump(runtime);
+            clump.spawnAtCell(game, cell);
+            runtime.getMonsters().add(clump);
+        }
+
+        // Hounds meiden die Clump-Zellen — sonst stapeln sich beide Populationen
+        for(int[] cell : Cells.far(layout, runtime.getRnd(), density * Cells.areaScale(layout),
+            (x, z) -> corners.stream().noneMatch(corner -> Math.abs(corner[0] - x) + Math.abs(corner[1] - z) < 4))) {
+            Hound hound = new Hound(runtime);
+            hound.spawnAtCell(game, cell);
+            runtime.getMonsters().add(hound);
+        }
+    }
+
+    /** Nachschub: Clumps an Ecken, sonst Hounds. */
+    @Override
+    public BackroomsMonster createRoamingMonster(LevelRuntime runtime, int[] cell) {
+        LevelLayout layout = runtime.getLayout();
+        if(Cells.openOrthogonal(layout, cell[0], cell[1]) == 2) return new Clump(runtime);
+        return runtime.getRnd().nextInt(100) < 60 ? new Hound(runtime) : new Deathmoth(runtime);
+    }
+
+    /** "Serienschaltung": ca. alle 45 s faellt ein Drittel der Lichter fuer ~8 s aus. */
+    @Override
+    public void onLevelTick(BackroomsGame game, LevelRuntime runtime) {
+        if(this.failedSegment < 0) {
+            this.eventSeconds++;
+            if(this.eventSeconds < LIGHT_FAIL_PERIOD_SECONDS) return;
+
+            int segment = runtime.getRnd().nextInt(3);
+            this.failedSegment = segment;
+            this.eventSeconds = LIGHT_FAIL_DURATION_SECONDS;
+            this.setSegmentLights(game, runtime, segment, Block.DEEPSLATE_TILES);
+            runtime.playersInLevel().forEach(player ->
+                player.playSound(Sound.sound(SoundEvent.BLOCK_REDSTONE_TORCH_BURNOUT, Sound.Source.AMBIENT, 1f, 0.6f), Sound.Emitter.self()));
+            return;
+        }
+
+        this.eventSeconds--;
+        if(this.eventSeconds > 0) return;
+        this.setSegmentLights(game, runtime, this.failedSegment, PALETTE.light());
+        this.failedSegment = -1;
+        this.eventSeconds = 0;
+    }
+
+    /** Setzt die Deckenbloecke eines nach x sortierten Drittels aller Lichtzellen. */
+    private void setSegmentLights(BackroomsGame game, LevelRuntime runtime, int segment, Block block) {
+        LevelLayout layout = runtime.getLayout();
+        List<int[]> lights = new ArrayList<>(layout.getLightCells());
+        lights.sort(Comparator.comparingInt(cell -> cell[0]));
+
+        int from = segment * lights.size() / 3;
+        int to = segment == 2 ? lights.size() : (segment + 1) * lights.size() / 3;
+        int ceilingY = runtime.getBaseY() + 2 + PALETTE.roomHeight();
+        for(int i = from; i < to; i++) {
+            int[] cell = lights.get(i);
+            game.setBlock(layout.worldX(cell[0]) + 1, ceilingY, layout.worldZ(cell[1]) + 1, block);
+        }
+    }
+
+    @Override
+    public AmbienceProfile ambience() {
+        return new AmbienceProfile(
+            SoundEvent.AMBIENT_NETHER_WASTES_LOOP,
+            0.25f,
+            0.5f,
+            15,
+            List.of(SoundEvent.BLOCK_ANVIL_LAND, SoundEvent.BLOCK_LAVA_POP),
+            0.02
+        );
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/level/impl/LevelPoolrooms.java

@@ -0,0 +1,182 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.impl;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience.AmbienceProfile;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelDefinition;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelPalette;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.TransitionType;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.generator.MazeAlgorithms;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.BackroomsMonster;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.monster.Hound;
+import net.kyori.adventure.sound.Sound;
+import net.minestom.server.coordinate.Pos;
+import net.minestom.server.entity.Player;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.network.packet.server.play.ParticlePacket;
+import net.minestom.server.particle.Particle;
+import net.minestom.server.sound.SoundEvent;
+
+import java.util.List;
+import java.util.Random;
+
+/**
+ * "The Poolrooms": halb geflutete, weisse Fliesenhallen mit hohen Decken und
+ * grossen Wasserbecken — die Verschnaufpause zwischen den gefaehrlichen Ebenen.
+ * Ausgang: ein Abfluss (Loch) am Beckengrund.
+ */
+public class LevelPoolrooms extends LevelDefinition {
+    private static final LevelPalette PALETTE = new LevelPalette(
+        List.of(Block.QUARTZ_BLOCK, Block.WHITE_CONCRETE),
+        List.of(Block.QUARTZ_BLOCK, Block.WHITE_GLAZED_TERRACOTTA, Block.WHITE_CONCRETE),
+        List.of(Block.SMOOTH_QUARTZ),
+        Block.SEA_LANTERN,
+        Block.QUARTZ_PILLAR,
+        6,
+        Block.WHITE_GLAZED_TERRACOTTA,
+        true,
+        List.of(),
+        0,
+        List.of(),
+        0
+    );
+
+    @Override
+    public LevelType type() {
+        return LevelType.POOLROOMS;
+    }
+
+    @Override
+    public LevelLayout buildLayout(Random rnd, int cells, int playerCount) {
+        LevelLayout layout = this.openLayout(rnd, cells, playerCount, cells / 4, 2);
+
+        // 3-5 grosse rechteckige Wasserbecken; das erste ist doppelt tief
+        int pools = 3 + rnd.nextInt(3);
+        for(int i = 0; i < pools; i++) {
+            int width = 4 + rnd.nextInt(5);
+            int depth = 4 + rnd.nextInt(5);
+            int startX = 1 + rnd.nextInt(Math.max(1, cells - width - 2));
+            int startZ = 1 + rnd.nextInt(Math.max(1, cells - depth - 2));
+            LevelLayout.Cell poolType = i == 0 ? LevelLayout.Cell.DEEP_WATER : LevelLayout.Cell.WATER;
+            for(int x = startX; x < startX + width; x++) {
+                for(int z = startZ; z < startZ + depth; z++) {
+                    if(layout.cellAt(x, z) != LevelLayout.Cell.FLOOR) continue;
+                    if(Cells.reserved(layout, x, z)) continue;
+                    layout.setCell(x, z, poolType);
+                }
+            }
+        }
+
+        // Kupfer-Leitungsstraenge unter der Decke, quer durch die Hallen — mit Undichtigkeiten
+        int ducts = 3 + rnd.nextInt(3);
+        for(int i = 0; i < ducts; i++) {
+            boolean alongX = rnd.nextBoolean();
+            int fixed = 3 + rnd.nextInt(cells - 6);
+            for(int j = 2; j < cells - 2; j++) {
+                int x = alongX ? j : fixed;
+                int z = alongX ? fixed : j;
+                if(layout.cellAt(x, z) != LevelLayout.Cell.FLOOR) continue;
+                if(Cells.reserved(layout, x, z)) continue;
+                if(MazeAlgorithms.isChamberProtected(layout, x, z)) continue;
+                // ~8% der Leitungszellen sind undicht — dort laeuft das Wasser heraus
+                layout.setCell(x, z, rnd.nextInt(100) < 8 ? LevelLayout.Cell.LEAK : LevelLayout.Cell.PIPE);
+            }
+        }
+        layout.getLightCells().removeIf(cell -> {
+            LevelLayout.Cell type = layout.cellAt(cell[0], cell[1]);
+            return type == LevelLayout.Cell.PIPE || type == LevelLayout.Cell.LEAK;
+        });
+
+        // Abfluss: Wasser stroemt ringfoermig auf das Exit-Loch zu — die Rutsche nach unten
+        int[] exit = layout.getExitCell();
+        if(exit != null) {
+            for(int dx = -1; dx <= 1; dx++) {
+                for(int dz = -1; dz <= 1; dz++) {
+                    if(dx == 0 && dz == 0) continue;
+                    if(layout.cellAt(exit[0] + dx, exit[1] + dz) != LevelLayout.Cell.FLOOR) continue;
+                    layout.setCell(exit[0] + dx, exit[1] + dz, LevelLayout.Cell.WATER);
+                }
+            }
+        }
+
+        // Dampf-Ventile: an zufaelligen Leitungs- und Beckenraendern zischt es
+        for(int i = 0; i < cells / 5; i++) {
+            int x = 2 + rnd.nextInt(cells - 4);
+            int z = 2 + rnd.nextInt(cells - 4);
+            LevelLayout.Cell type = layout.cellAt(x, z);
+            if(type == LevelLayout.Cell.PIPE || type == LevelLayout.Cell.LEAK || type == LevelLayout.Cell.WATER) {
+                layout.getMarkerCells().add(new int[]{x, z});
+            }
+        }
+
+        // 1-2 kleine dunkle Ecken
+        Cells.darkBlobs(layout, rnd, 1 + rnd.nextInt(2), 2, 3);
+
+        return layout;
+    }
+
+    @Override
+    public LevelPalette palette() {
+        return PALETTE;
+    }
+
+    @Override
+    public TransitionType transitionType() {
+        return TransitionType.HOLE;
+    }
+
+    /** Dampf-Ventile: Wolkenpartikel + Zischen an den Markern in Spielernaehe. */
+    @Override
+    public void onLevelTick(BackroomsGame game, LevelRuntime runtime) {
+        LevelLayout layout = runtime.getLayout();
+        List<Player> players = runtime.playersInLevel();
+        for(int[] vent : layout.getMarkerCells()) {
+            Pos ventPos = runtime.toPlayerPos(vent);
+            for(Player player : players) {
+                if(player.getPosition().distance(ventPos) > 28) continue;
+                player.sendPacket(new ParticlePacket(
+                    Particle.CLOUD,
+                    ventPos.x(), ventPos.y() + 2.5, ventPos.z(),
+                    0.3f, 0.6f, 0.3f, 0.02f, 6
+                ));
+                if(runtime.getRnd().nextInt(100) < 12) {
+                    player.playSound(
+                        Sound.sound(SoundEvent.BLOCK_LAVA_EXTINGUISH, Sound.Source.AMBIENT, 0.4f, 1.6f),
+                        ventPos.x(), ventPos.y(), ventPos.z()
+                    );
+                }
+            }
+        }
+    }
+
+    /** Die Poolrooms sind bewusst fast leer — erst bei maximaler Dichte streift ein Hound umher. */
+    @Override
+    public void populateMonsters(BackroomsGame game, LevelRuntime runtime, int density) {
+        if(density < 3) return;
+        for(int[] cell : Cells.farWalkable(runtime.getLayout(), runtime.getRnd(), 1)) {
+            Hound hound = new Hound(runtime);
+            hound.spawnAtCell(game, cell);
+            runtime.getMonsters().add(hound);
+        }
+    }
+
+    /** Die Poolrooms bleiben ueberwiegend friedlich — nur selten verirrt sich ein Hound hierher. */
+    @Override
+    public BackroomsMonster createRoamingMonster(LevelRuntime runtime, int[] cell) {
+        return runtime.getRnd().nextInt(100) < 20 ? new Hound(runtime) : null;
+    }
+
+    @Override
+    public AmbienceProfile ambience() {
+        return new AmbienceProfile(
+            SoundEvent.AMBIENT_UNDERWATER_LOOP,
+            0.3f,
+            1f,
+            10,
+            List.of(SoundEvent.BLOCK_POINTED_DRIPSTONE_DRIP_WATER, SoundEvent.ENTITY_DOLPHIN_AMBIENT_WATER),
+            0.03
+        );
+    }
+}

src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/backrooms/loot/ChestManager.java

@@ -0,0 +1,199 @@
+package eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.loot;
+
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.BackroomsGame;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.ambience.Jumpscare;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.item.BackroomsItems;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelLayout;
+import eu.mhsl.minenet.minigames.instance.game.stateless.types.backrooms.level.LevelRuntime;
+import net.kyori.adventure.sound.Sound;
+import net.minestom.server.coordinate.BlockVec;
+import net.minestom.server.coordinate.Point;
+import net.minestom.server.coordinate.Pos;
+import net.minestom.server.network.packet.server.play.BlockChangePacket;
+import net.minestom.server.entity.Player;
+import net.minestom.server.event.player.PlayerBlockInteractEvent;
+import net.minestom.server.instance.block.Block;
+import net.minestom.server.item.ItemStack;
+import net.minestom.server.sound.SoundEvent;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.UUID;
+
+/**
+ * Loot-Kisten (Barrels):
+ * - Normale Kisten sind einmal pluenderbar und verschwinden. Der Loot haengt vom
+ *   Inventar ab — wer schon viel Almond Water traegt, findet kaum noch welches;
+ *   wer generell voll ist, findet hoechstens noch den Schluessel.
+ * - In Key-Door-Leveln kann JEDE Kiste mit etwas Glueck den Level Key enthalten
+ *   (solange die Tuer zu ist und der Spieler noch keinen hat); die dedizierte
+ *   Schluessel-Kiste gibt ihn jedem Spieler garantiert einmal.
+ */
+public class ChestManager {
+    private static final int RANDOM_KEY_CHANCE_PERCENT = 10;
+    private static final int RANDOM_COMPASS_CHANCE_PERCENT = 10;
+
+    private final BackroomsGame game;
+    private final Map<Point, Integer> chestLevels = new HashMap<>();
+    private final Map<Point, Integer> keyChestLevels = new HashMap<>();
+    private final Map<Point, Set<UUID>> keyChestLooters = new HashMap<>();
+    private final Map<Point, Set<UUID>> chestLooters = new HashMap<>();
+
+    public ChestManager(BackroomsGame game) {
+        this.game = game;
+
+        for(LevelRuntime level : game.getLevels()) {
+            int chestY = level.getBaseY() + 2;
+            level.getLayout().getChestCells().forEach(cell ->
+                this.chestLevels.put(this.blockPos(level, cell, chestY), level.getIndex())
+            );
+            if(level.getLayout().getKeyChestCell() != null) {
+                this.keyChestLevels.put(this.blockPos(level, level.getLayout().getKeyChestCell(), chestY), level.getIndex());
+            }
+        }
+    }
+
+    private Point blockPos(LevelRuntime level, int[] cell, int y) {
+        Pos center = level.toPlayerPos(cell);
+        return new Pos(center.blockX(), y, center.blockZ());
+    }
+
+    public void onInteract(PlayerBlockInteractEvent event) {
+        if(!event.getBlock().compare(Block.BARREL)) return;
+        Point position = new Pos(event.getBlockPosition().blockX(), event.getBlockPosition().blockY(), event.getBlockPosition().blockZ());
+        Player player = event.getPlayer();
+
+        Integer keyLevel = this.keyChestLevels.get(position);
+        if(keyLevel != null && !this.game.isDoorOpened(keyLevel)) {
+            event.setCancelled(true);
+            event.setBlockingItemUse(true);
+            Set<UUID> looters = this.keyChestLooters.computeIfAbsent(position, unused -> new HashSet<>());
+            if(!looters.add(player.getUuid())) {
+                player.playSound(Sound.sound(SoundEvent.BLOCK_CHEST_LOCKED, Sound.Source.BLOCK, 0.8f, 0.9f), position.x(), position.y(), position.z());
+                return;
+            }
+            this.giveKey(player, keyLevel);
+            player.playSound(Sound.sound(SoundEvent.BLOCK_BARREL_OPEN, Sound.Source.BLOCK, 1f, 0.8f), position.x(), position.y(), position.z());
+            this.hideChestFor(player, position);
+            return;
+        }
+
+        Integer chestLevel = keyLevel != null ? keyLevel : this.chestLevels.get(position);
+        if(chestLevel == null) return;
+
+        event.setCancelled(true);
+        event.setBlockingItemUse(true);
+
+        // Kisten sind per Spieler pluenderbar — niemand nimmt anderen den Loot weg
+        Set<UUID> looters = this.chestLooters.computeIfAbsent(position, unused -> new HashSet<>());
+        if(!looters.add(player.getUuid())) {
+            // Falls der Chunk neu gesendet wurde und der Barrel wieder aufgetaucht ist: erneut ausblenden
+            this.hideChestFor(player, position);
+            return;
+        }
+
+        List<ItemStack> loot = this.rollFor(player, chestLevel);
+        loot.forEach(item -> player.getInventory().addItemStack(item));
+
+        SoundEvent sound = loot.isEmpty() ? SoundEvent.BLOCK_BARREL_CLOSE : SoundEvent.BLOCK_BARREL_OPEN;
+        player.playSound(Sound.sound(sound, Sound.Source.BLOCK, 1f, 0.8f), position.x(), position.y(), position.z());
+        this.hideChestFor(player, position);
+
+        // Kisten sind ein guter Jumpscare-Anker: kleine Chance auf einen Sound-Scare
+        if(this.game.rnd().nextInt(100) < 20) {
+            Jumpscare.sound(player, this.game.rnd());
+        }
+    }
+
+    /**
+     * Blendet die gepluenderte Kiste NUR fuer diesen Spieler aus — der Serverblock
+     * bleibt, alle anderen sehen den Barrel weiter.
+     */
+    private void hideChestFor(Player player, Point position) {
+        player.sendPacket(new BlockChangePacket(new BlockVec(position.blockX(), position.blockY(), position.blockZ()), Block.AIR));
+    }
+
+    /**
+     * Inventarabhaengiger Loot. In Key-Door-Leveln sind Key (10 %) und Tuerkompass (10 %)
+     * getrennt voneinander findbar — beides maximal einmal pro Spieler.
+     */
+    private List<ItemStack> rollFor(Player player, int levelIndex) {
+        List<ItemStack> result = new ArrayList<>();
+
+        LevelRuntime level = this.game.getLevels().get(levelIndex);
+        boolean doorRelevant = level.getDefinition().usesKeyDoor() && !this.game.isDoorOpened(levelIndex);
+        if(doorRelevant && !BackroomsItems.hasMatching(player, item -> BackroomsItems.isKeyFor(item, levelIndex)) && this.game.rnd().nextInt(100) < RANDOM_KEY_CHANCE_PERCENT) {
+            result.add(BackroomsItems.levelKey(levelIndex));
+        }
+        if(doorRelevant && !this.hasCompassFor(player, levelIndex) && this.game.rnd().nextInt(100) < RANDOM_COMPASS_CHANCE_PERCENT) {
+            ItemStack compass = this.createCompass(levelIndex);
+            if(compass != null) result.add(compass);
+        }
+
+        int almond = BackroomsItems.count(player, BackroomsItems.ALMOND_WATER);
+        int energy = BackroomsItems.count(player, BackroomsItems.ENERGY_BAR);
+        int carried = almond + energy;
+
+        // Randvolles Inventar: die Backrooms geben dir nichts mehr — hoechstens Key/Kompass
+        if(carried >= 16) return result;
+
+        LootTable table = new LootTable();
+        int almondWeight = Math.max(0, 5 - almond);
+        int energyWeight = Math.max(1, 10 - energy);
+        if(almondWeight > 0) table.add(BackroomsItems::almondWater, almondWeight);
+        table.add(BackroomsItems::energyBar, energyWeight);
+        table.add(() -> ItemStack.AIR, 4);
+        result.addAll(table.roll(this.game.rnd()));
+
+        return result;
+    }
+
+    private void giveKey(Player player, int levelIndex) {
+        player.getInventory().addItemStack(BackroomsItems.levelKey(levelIndex));
+        player.getInventory().addItemStack(BackroomsItems.almondWater());
+    }
+
+    private ItemStack createCompass(int levelIndex) {
+        Point doorPosition = this.doorPositionOf(levelIndex);
+        if(doorPosition == null) return null;
+        return BackroomsItems.doorCompass(levelIndex, this.game.getDimensionName(), doorPosition);
+    }
+
+    /** Nach dem Tueroeffnen: alle Nachzuegler bekommen automatisch einen Kompass zur offenen Tuer. */
+    public void giveCompassIfMissing(Player player, int levelIndex) {
+        if(this.hasCompassFor(player, levelIndex)) return;
+        ItemStack compass = this.createCompass(levelIndex);
+        if(compass != null) player.getInventory().addItemStack(compass);
+    }
+
+
+    private Point doorPositionOf(int levelIndex) {
+        LevelRuntime level = this.game.getLevels().get(levelIndex);
+        LevelLayout layout = level.getLayout();
+        int[] door = layout.getDoorCell();
+        if(door != null) {
+            return new Pos(layout.worldX(door[0]) + 1, level.getBaseY() + 2, layout.worldZ(door[1]) + 1);
+        }
+        // Fallback (Finale-Seitentueren setzen kein doorCell): erste DOOR-Zelle suchen
+        for(int cx = 0; cx < layout.getCells(); cx++) {
+            for(int cz = 0; cz < layout.getCells(); cz++) {
+                if(layout.cellAt(cx, cz) == LevelLayout.Cell.DOOR) {
+                    return new Pos(layout.worldX(cx) + 1, level.getBaseY() + 2, layout.worldZ(cz) + 1);
+                }
+            }
+        }
+        return null;
+    }
+
+    private boolean hasCompassFor(Player player, int levelIndex) {
+        return BackroomsItems.hasMatching(player, item ->
+            BackroomsItems.is(item, BackroomsItems.DOOR_COMPASS)
+                && Integer.valueOf(levelIndex).equals(item.getTag(BackroomsItems.KEY_LEVEL_TAG)));
+    }
+
+
+}