I managed to play through it all, but boy was this game hard.
Adding fall damage to a metroidvania was a brave decision! It was waaay too punishing though, like even falling from the shortest height would damage you. The character was a bit too slow and made jumping even more cumbersome. Fortunately, the gravity boots eased much of the early game frustration, so I kept pushing through.
I liked the enemies, but those flying monkeys gave me some real PTSD (and my dumb ass thought they were crazed pidgeons before the dialogue clarified it for me). The boss fight was very interesting, but the fact his projectiles could block my own made me die a LOT to my fireballs. Finally, as others have said, the control scheme could use some serious work.
On the upside, I loved the aestethics! Your art style paired with that background music (did you compose it?) made it somewhat unsettling, which I absolutely liked.
With more work on the character controller and nerfed fall damage, this could be pretty great! Despite all the issues, I love challenging games and had my fair share of fun.