I loved this entry. I'm trash at jump king style games, but this was cool. Love the art style and the SFX. Took me like 5 minutes to get off the ground in that first section. HAHA, so just to let you know I was pretty bad. The checkpoint system was a life saver once I finally got off the ground and saved me some frustration.
I think with more time and practice I could master this one. Would probably add WASD as a control system as well. My keyboard doesn't have arrow keys, so I have to hold a modifier to use systems like this or use another computer.
Good job!