That's a pretty neet puzzle-platformer! I both liked and disliked how it wasn't obvious that it's a puzzle about gems swapping - it was a bit annoying like "why the hell I can do this by can do this," but then it was a quite cool "aha!" when you figured that it's exactly the point of the game :) And then it was a pleasure to figure the order and configuration :) Well done!
Also liked the art and the visuals! The "theme" part is not really there, though, to be hones, but otherwise - great submission!