I played this before the reviews opened, and I really enjoyed it! It was an excellent blend of a puzzle game/platformer, the visuals were charming, and it generally felt good to play.
My biggest gripes were the fact that the music got a bit old after a while, and that the hard mode levels felt a bit too long. If you ever came back to it, I think extra platforming/obstacles/some secret third thing would be a great addition and really bring everything together. Even without that, though, I enjoyed the game a lot, and spent a good while getting through the levels and working out how to optimize my movement.
Excellent work!