Good game.
Not bad, I happen to enjoy puzzle games like this and am always happy when I find a good one. This one is good, but not great. First off, I liked the smooth graphics; they sort of reminded me of clay and that brought back some childhood memories, which was nice, but touching up the lifeless backgrounds a little would be even nicer. The music was good, and surprisingly not annoying, though the crash sound got very repetitive after a while. I liked how challenging this game was without resorting to cheating. I didn't notice any clipping troubles and your collision detection seems very well-done. The controls are nice too and fit the theme of the game very well. My main problem is that you didn't take advantage of any physics based puzzles. If you had used a couple of those it would have really pushed this game into the next level and made it stand out from others of this type. Still, I liked it, though I didn't beat it. Guess I'll have to go back and try again! :)