Huh. It crashed when pressing play? That hasn't happened for anyone I've tested it on! What OS are you on, and did you try it more than once?
EDIT: Partially sorted out on IRC. If anyone else has this bug, it appears that disabling particles, loading the game, then reenabling them fixes the problem. I'll try and get to the bottom of this bug tomorrow, but it may be difficult as I cannot reproduce it on my machine.