nice little shooter that is really well wrapped up!
some nice QOL things that i would add to make it a bit more noticeable. If you die, maybe having your ship "flash while invulnerable" for a short period to let the player know they lost a life. It was a bit difficult at times to track my health.
Boss fight felt really odd. I know you stop to battle him, but he felt way to far up the screen and trying to get closer to him would result in not being able to dodge very well. So maybe moving the boss down more so you can see him more.
Also with the boss battle, i feel like you could continue with the background scroll to keep it visually more interesting then stopping. what ends up happening in the current scenario is you go under a cloud that keeps getting in your way so you cant really dodge or guess to dodge well.