I really like the interface design and the art! The gameplay was a little confusing, but it may be because it bugged out on me. I think a built in tutorial or a very simplified first level would help. Also some feedback for when you try to do an illegal or unavailable move, to make it clear what you are doing wrong. Overall a cool game with potential.
I also found a little bug: if you quit to main menu and try to start again, no level loads.