Hi!
Loved the art and the idea of a boxing metroidavania. With that said i think the enemies are too strong (or that the number of enemies around the captain is high) and I'm not even talking about the boss that i can see in the gifs so i'm guessing he is a behemoth :D
Keep up the good work!
P.S.: Code related - When going through a screen using a attack the starting orientation is the opposite. In other words, if you get to the end of a screen and keep pressing the attack key you will jump between screens.