i had a lot of fun with your game. the music and art made it feel very relaxing and even kind of cozy for me.
if i had to give you some suggestions, then i'd say you could maybe have added some sound effects for when you shoot an enemy. also you should look up how to normalize vectors because in this case the player moves faster in diagonals, and that's often because you are not normalizing the movement vector.
overall, i liked it a lot.