Hi deuxdeux! Sorry to hear about the crashes... we're very new to game development (this is our first attempt at writing a game!) and are not sure what it could be I'm afraid :( If we figure something out we'll post again to let you know.
Perhaps another browser could work? Or you could download the game?
PS I just tried your game: similar concept to ours. You've got wonderful visual and sound design, and it plays very nicely!