Laggy
The game kept lagging where everything would freeze for a moment then start up again. I set quality to low and that didn't change a thing. My computer is a Macbook, 1.86 GHz Core Duo processor, 2 GB RAM. Not the fastest computer around but I have no trouble playing Fantastic Contraption (another physics game that has a lot more objects on the screen than this does). It's too bad because I usually like physics games.