Ooh this has been one of my favorites! Really great pixel art with a cohesive style. Love the concept and execution (mostly).
I did feel it was pretty hard to hit anything without the slow down or waiting for your special attack. There are a lot of knobs you could tweak to help with that (slower base spin speed, bigger bullet hitboxes, bigger magazine size, maybe dual wielding?). I think with a bit more play testing you could have an awesome experience here!
Great work!!