added timeout for tetris and display points at end of PointsWinScore

src/main/java/eu/mhsl/minenet/minigames/score/Score.java

@@ -103,6 +103,8 @@ public abstract class Score {
         return isClosed;
     }
 
+    public void close() { isClosed = true; }
+
     protected void onGameEnd() {
         this.instance.stop();
     }