This game was an absolute blast to play!
The artstyle for the game looks great, it has a really cool retro kinda vibe with the color palette and such.
The game itself was also just really fun to play and I spent quite a bit of time trying to beat my own highscore (535, midway through level 10), like the hat felt really nice to kick around and sort of chain combos with.
I also agree with what most of the other comments said. One suggestion I have that I didn't see anyone else mention would be to possibly match some of the art like the health or stamina icon with the same color palette as the rest of the game, and make it a bit smaller so you don't have to scale them as much (then the pixel sizes would match as well).
Anyways good job! I'll let you know if I make it past level 10 lol.