I really like the art style, the art for the outside tiles feels like it clashes a bit with the sprites, but since they're on screen for so little time it barely matters. My biggest problem with the game is that everything feels super bullet-spongey, which wouldn't be that big a problem if you could just hold down the button to shoot instead of spamming it. The standard platformer QOL features (jump buffering, variable jump, coyote time, etc...) would also help make the player controller feel even better. The fact that you managed to fit in a two-phase bossfight into this jam game is super impressive. Really good game.