This game is so cute! The puzzles aren't overly difficult and well designed with a ramping difficulty that never becomes overwhelming. The art, SFX and music all fit together well and everything worked well. I also like that there is an undo button, but again the design was so good I never felt like I truly needed it and felt restarting was a fine decision. I'd keep polishing what you've got here.
Congrats on this submission because it's great!