I really like the boss rush aspect of the game. Its something I've always wanted to do. I would have liked the ability to hold down the gun to fire or at least maybe higher damage projectiles with a slower firerate; just so my finger doesn't cramp.
I played the game on the itch client and it didn't have any audio. My guess is that its not using the windows version and instead using the html version on the client and that's why.
The enemy art was cute. If the background looked a little more interesting I'd say the overall visuals would have been fairly nice.
Overall, pretty good submission.