I love the guns being “physical” and you being able to see the projectile loaded inside of them before you fire, really nice touch.
Shader work overall really nice too.
For improvement, the main thing I can think of is: it feels claustrophobic, the player and enemy ships feel a bit too big for the arena for my taste (but maybe that’s what you were going for?). Also maybe the projectiles could curve a bit around black holes.