Your character feels so heavy and difficult to air jump with, I had to exploit the ability to shoot projectiles and spam as many as I can on the screen, slowing the game down long enough to consistently air jump. After that, the game became too easy, as the slower speed and infinite jumps allowed me to clear levels by button mashing.
But that being said, I found the visual design very charming, and I still had a fun time! You still did a great job! I suggest trying to make your character less heavy, as that would probably give a greater window to air jump too. If you insist on infinite jumps, then at least cut down on how many projectiles you can have onscreen at once, so slowdown exploits aren't so easy to pull off.