Nice. I played with the mattress in the room where the needle was. Everything went crazy mattress started to jump around by itself , there were a lot of noise of broken doors and when "storm" abated I went down the corridor to find out that almost every dynamic object was disappeared including doors. So I beat the level very easy
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I know that's a bug in the engine when playing with ragdoll-like stuff sometimes, it's not your fault.
Actually that's some very impressive work, especially for a 13 years boy.