I really enjoyed what I played! I liked the more fantasy theme you were going for with this game rather than just a bunch of random world types. Felt like they were all connected in some way compared to the usual fan games that have you going through completely different world types from room to room. I really liked the color choices you used in some areas as well!
Some minor issues I ran into:
1) I wasn't able to launch the game through itch.io launcher.
2) In the Moon/Sun castle ish area, the BGM sound balance is a bit louder than the rest of the game.
I made a video with my experiences and thoughts! Keep up the great work!