Very cool! Very elegant, I like the style, and I like how intuitive it is to play, and yet gets tricky in some of the later levels are. I'm currently on level

Very cool! Very elegant, I like the style, and I like how intuitive it is to play, and yet gets tricky in some of the later levels are. I'm currently on level 12 with perfect stars. To me the order of the levels doesn't quite always increase, sometimes a later level is easier. This could just be whatever path I happen to see first, though. If you're collecting data, though, you may be able to use it to re-order your levels. One small thing that could be nice: the sound of a "click" like a go piece when the pieces collide. A lot of go games have a pleasing click sound, and I think it would be good here. (If you wanted to be fancy it could even be a click when the pieces collide, and a hollow this when it hits the side of the board.)