Really nice game! I'm not sure if it's intended but I found a bug where if the player hugs any wall, the player's projectiles gets destroyed. It's possible that this is because the projectiles are being spawned in the middle of the player. You can try designating a separate empty object in front of the player (and enemies as well) so it'll be okay even if the player hugs a wall. Still, really great job! I really like the music!