Cool hard game :-)!
It was for certain a hard an difficult game for me (just me being bad at this kind of game), but I imagine that was part of the challenge in this game. Did manage to slay 1 boss at least :-). Nice visual pixel art style with bloom. Basic shapes and colors but still in style for the whole game and visually pleasing.
Liked the audio also and the beat fitted well with the frantic fighting gameplay. The volume buttons in the game were an unique and fun idea :-)!
Had fun playing and trying to defeat the bosses! (Maybe a walkthrough video how to defeat all bosses would be nice for us participants that did not make it ;-)...)
No UI is checked and theme also slightly checked but ok.
Overall a well done fighting game as someone already said..souls like :-)! Nice job!