Not all that great.

This game has a nice premise, if somewhat uninspired. However, the game itself became repetitive and boring extremely quickly. Introducing some rogue elements would work wonders.
The art was done very nicely, and the music and sound effects were rather lovely, certainly not a part of the game that would begin to grate after a while, as some game music/SFX can.
The main problem here was the control scheme. It was sticky and laggy, and that made the game very difficult to enjoy. Something to work on for the next game, perhaps.
All in all, potentially a decent game, but needs some work.