I like the feel of the game. It is definitely hard to master, but easy to pick up. Nice artstyle, reminds me of the old Cartoon Network flash games.
Only feedback I have is for the levels to include a timer, at least as an option so players can be aware of their time during the level. I notice some levels where the tilesets are missing some corner pieces. The bottom right seems to be a missed corner piece.
Other than that, really good game, would gladly try and beat the developer time.