Yay a shmup! I love the retro art style, and how I was able to upgrade my ship pretty early into the game.

I was doing pretty horribly at first since the instructions said to use arrow keys, and (at least for me) the arrow keys actually cause the itch page to scroll. So the page would scroll up and down while I was moving my ship up and down. :D  WASD worked fine though, so I flipped to that. 

I also wasn't always sure if I was hitting the enemies. I figured that if I saw a health bar, I was probably doing something right...but it would be cool to get audio or visual reinforcement that landed a hit.

Keep it up! It's lookin' good.