One of the best
I'd be hard pressed to decide between this and Amorphous+ for my favourite game on NG. You might want to change the description, though, as I expected it to be another mediocre action game - at least mention that it's a puzzle/strategy game.
Anyway, the graphics are excellent, the gameplay is addictive and challenging, and the interface is slick. With the addition of a fixed puzzle mode, this could easily be a downloadable title. The only thing I didn't like was the music... if you're only going to have one song, it needs to be something more neutral and unobtrustive.
Amazing job, really.