Wow, you made a lot of levels! The game controls well and is fun to play. As others have mentioned, a good basis for a mobile game. Two minor pieces of criticism: The visual language could be clearer. The background objects are sometimes hard to distinguish from the foreground objects at times and the moving blocks could use some way to distinguish them visually from non-moving blocks. Also, I found the transition between levels a little abrupt. Would have been nice to have some "Level complete" screen or something similar in there for a couple seconds, just so the player can readjust and doesn't take the momentum from one level into the next.