Good concept and good execution. The aesthetics are adorable. The animation on the main character is amazingly smooth. My only real gripe is that the game is kind of slow and the level design didn't seem to do much exploration of the mechanic as far as I got.
It might be smart to try and implement some mechanics in the level (like conveyors belt or rivers that carry you along at a swift pace) to alleviate the pacing a bit.