I had so much fun playing this game. I literally laughed my ass off when I figured out the solution to the thrid level (not gonna spoil it though) and some of the levels had very clever solutions. The art style is beautiful and the controls were good.
Perhaps the only criticism I have (gotta think of something) is that the effects of attaching yourself to each material need to be better explained. It wasn't that hard to figure out anyway, but still, would've been better in my opinion.
Overall, I had so much fun playing this game. Nicely done.