Awesome concept and execution! One of the best games in the jam. And also it have pretty original mechanic. But last level is lame, all stars are just given to you. I guess this is because of time, but still it's lame.
And in level 2 walls and floor are a bit mixed up, maybe it's better to make colors a bit more different.
But this is still one of the best games and it's really polished, so great job and good luck in your projects!