Not bad, I liked the music in the main menu the most I think. Some of my feedback:
- Blue screen joke was a bit overused. Yeah, it was funny the first time, but then - not much. So I would show it only one time, and then some kind of default game over screen. Because, imo, getting blue flash each time you die becomes kinda annoying. Also I think it kinda ruins some of the initial drama build up after the initial cutscene;
- Main character attack can be abused. Seems like it attacks much faster, if you spam left and right direction keys;
- https://ibb.co/hx6SN5tb - got the bug, when boss was outside of arena and wasn't casting anything, dunno exactly why it happen.
Overall game felt a bit hard, but I guess because I wasn't used to not having any i-frames, so you kinda need to play very carefully.