Great game with good mechanics
However, the game is quite derivative (aesthetically and mechanically) from other art games - it's hard to make an art flash game stand out. Additionally, I breezed through all the levels - the game wasn't particularly hard, and mechanics were perhaps not exploited to their full extent; I like games with interesting ideas to really push the envelope.
Aside from these critisisms, the game is well made, had nice graphics, and clearly took a lot of thought to make; the recycling of levels using different mechanics was particularly clever.