I like the idea, and the fact that all levels are different. The physics and layouts work well, and some levels are more challenging then others where you need quick reflexes as well as logic. I guess it's more of a reflex game than a puzzle game, and I guess mine aren't that great since just normal mode is a hard task to beat. Just 5 points for normal difficulty level? Seems a bit low, but otherwise nice game!
-cd-