@Rokas
That is pretty weird. There is a shader issue I am aware of (some of the functions I used not available in all glsl versions I believe) which also crashes on start game. Might be the same bug, does it complains about shaders when you hit start playing? It should display before call stack.
@Hamfist McMutton
Thanks for the feedback. You are right about pretty much every point. Some are harder to fix (like art :() but I will try to improve them.
http://pastebin.com/9tzNJRJb