Lovely artstyle and the combat is really fun, took me a while to understand I could fly, I thought I simply had a jump until I saw the playthrough, then realised it was written in the loading screen, silly me. I still believe a small tutorial would of have been nice. The controls are extremely polished and behave really good, good job.
The music is super cool, I just wished it looped, because I spent half boss fight without that super cool music track.
The bosses are really cool, I feel they are too tanky for how easy they are to dodge, I was able to no hit the first and second boss, I'd say take some HP away from them and make their attacks slightly harder to dodge, I do like the first boss projectiles that come from the side, that forces me to touch ground or go high and when that combines with the fire attack, it's great, I say more of that pls.
Overall, solid game. It was very fun to play.