Pop!
I liked the games style, and the graphics weren't bad (they could be a little better if Im honest though). The music was slightly repetetive, but the tune you picked seemed to fit the games atmosphere pretty well I thought! - maybe something similar but a bit longer would have been a better choice?
Also, if you click the "toggle music" button at the top of the screen, the cannon wastes a shot, which is a bit of a nuisance.. and there's no replay level button that I could find either.
A par system would have been nice too (to quote the guy below me).
Over-all though, not a bad game. Well coded, and the gameplay was pretty fun :)