Wow this game is extremely charming. The boss fights are really well designed, it's packed full of detail and good gamefeel and the core premise is super clever! I really like the aesthetic and music too, the MIDI vibes were spectacular. I did run into some weird bugs sometimes with getting stuck on walls or not being able to move, but I WAS playing the web build and those got fixed by dying so it's not a huge deal. The idea of the negative skill tree is super interesting and unique, though I wonder if maybe it would've been a bit better to simplify the final boss and have a "filler" stage inbetween just to have more room to show it off. My only "gripe" with the game design is I felt the sword range was too tiny, but overall, pretty cool thing you have here!