Good job!  I thought the dodge and shoot back mechanic was a really good idea!  It would have been nice to have an indicator of when my spin was ready, and I think the shoot back mechanic could have been leaned into a little harder since it felt a little optional, but was really fun, but I liked what you did and thought it was a really good idea!

The game is fun, I think different bosses would have helped the feeling of progression. But otherwise I think the top down shooter with upgrades works well and is a fun concept.

I played a few times and accidentally figured out that you must shoot the powerups to buy them. It worked for me once I did that. That being said, with some additional bosses that have different attack patterns this could have potential.

I would have liked to see some form of health bar to know that I was doing damage to the boss. I know the color changes to represent that, but for the first 10 seconds of shooting, I felt like I was doing no damage to the boss. If you don’t want to put a health bar, then I’d at least add some type of flash animation to the boss or particle effect to the bullets so it’s clear that they are hitting the boss and not just going past.

The idea is fairly simple, but I imagine it makes up for that with the upgrades! Unfortunately  I wasn't able to get them to work no matter how hard I tried. Top-Down movement is always fun! Would love to see more attack patterns and variations through rounds in the future!

Edit: I forgot to mention, the art is really charming!