Oh no, that's really unfortunate !
My instinct is that the game asked for more ressources than what your computer/browser let it use but I could be wrong.
Anyway, thanks a lot for including the error with your message, if we ever come back to this game I'll make sure to look into the problem and try to solve it as best I can (I'll also include a downloadable build next time so that this sort of problem won't stop people from giving our game a try).