mountain 3 crash fix mod (keeps the boulder spawners alive, one word of t1l5m003), object palette test skips without a display

docs/manual/18-mods.md

@@ -185,6 +185,12 @@ Plays every level mirrored left to right, like the mirror mode of racing games.
 | Readable textures | on / off | off | Flips writing and pictures back so they read normally. Some textures (water edges, paths) then show seams. Off: a true mirror image. |
 | Mirror object models | on / off | off | Also mirrors the shape of objects such as huts and crates (characters stay as they are). Off: objects are only placed mirrored. |
 
+#### Mountain 3 crash fix
+
+Fixes a bug in Mountain chapter 3 that can crash the game: the rolling boulder spawners delete themselves too early and their boulders later write into the freed memory. With the fix the spawners stay alive; the boulders roll as before.
+
+*Id* `mountain3-fix`
+
 #### Practice tools
 
 Practise hard jumps: press F5 to remember where the llama stands and F8 to jump back there (in the same level; the keys can be changed below). Also adds extra checkpoints along the coin trail of levels that have checkpoints.