The art is very pleasing to look at, sound effects are nice and gameplay is fun !
The camera definitely needs to be moved forwards though, a good amount of the game's screenspace ends up being useless since there's nothing happening on the left of our character. Makes it hard to see where some ennemies's bullets are coming from too !
Some flying ennemies also blend in with the background a bit too much, thought bullets were appearing out of thin air at certain points ^^ more of a nitpicky thing though
Aside from that, the healing from shooting hostile bullets was a really nice mechanic ! Great work on your game <3