Hello,
This is quite an interesting game to play, I like the camera follower and quick responsive movements. However, there are a lot of things you can try to implement in this game, for example, dash, a few powerups, some effects when shooting, the enemy following bullets, various sorts of enemies, bombs, etc,. Also, the continuous flow of bullets is looking really odd, there should be one delay between each bullet spawn, so look at that if we can have that.