Cool and good overall experience, good ramping of difficulty from tutorial to fighting enemies to the boss fight.
I felt the movement was too slow, especially on the ground. I wish you got more air dashes instead of jumps when you picked up arrows. Multiple jumps didn't feel that useful compared to the airdash.
I liked the tutorial, except for the signs, as it wasn't obvious that you could hit them to get more information. I also wish you didn't have to play through the whole tutorial every time you died, would be nice if you started right at the kind.
Visual style was very nice, did you use crocotile for it? Also liked the music a lot, fit the game very well.
Found it annoying that shotgun bullets disappeared quickly, had many times where I was trying to shoot the boss with it and it wouldn't work, making me think the boss was invulnerable. Addition of a crt mode was cool, but I think the chromatic aberration effect was a little too much and hurt my eyes if I enabled that mode.
Liked the story elements of you killing the king and his family(?) to claim the crown.
Overall pretty solid entry.