That's pretty strange... I know that Unity limits the Webplayer to a set framerate, so it really shouldn't be stressing out your machine that much. Sorry
It seems like it's working better today both on FF and Chrome :/ Looks like I might have some other non DD related problems on my Air Anyway, thanks for the awesome game
Yay Glad the game wasn't a hazard for your machine. Had me worried there! More portable hardware is definitely something we're trying to target with the game.