What a great game! I really like the concept and how well it fits the theme. I couldn't even tell if it was physics based as it responds very well to the game play even when I tried to cheat by keeping the center of gravity very low.
I would have very much liked a way to rotate with the mouse or something more precise than the buttons offer. Still this would make a really great full release mobile game with a few gimmicks to make for some more interesting levels!
My high score was 252.9 weight by the way :D