During the first lvl I thought "what? this is so easy" then I went "ooooh, ok".
I've never seen this mechanic done exactly like this, made my brain hurt in a good way. There is a very interesting aspect of coordenation to it. I was engaged.
You managed to put a nice amount of polish in it also. Simple but with a good amount of juice. Loved the relaxing music too, it goes very well with this kind of game.