I downloaded the demo and can't say that I really liked it too much. There's really nothing wrong with the game, but rather the same old issue with a lot of (not all) iPhone/Touch games, the controls. It's too hard to control. If I could adjust the transparency of my fingers then I wouldn't have a problem.
It's a shame that I'm going to have to pass on this game. It'd make a great addition to the library of games that I play while I'm sitting on my throne. (in the bathroom) I absolutely loved the sound and music though.