I just wanna say that I love the game's start screen, it is hella cute, sometimes improvised is better than pretentiously meticulous.
As for the game, this really feels like a genuine bullet hell, things get pretty chaotic really fast, good job with these enemy patterns! Also, the player (hit) rewind is honestly one of the best hit animations I've ever seen in this jam, hands down! Nailed the audio and visuals for it, amazing! Art also looks really professional, if you did this all by yourself, amazing job!
The one thing that I'd note is the theme, alhtough I can rewind, most times I don't want to rewind so much, just slightly to readjust my ship and continue, maybe every 10 seconds your ship rewinds a random amount of time would have been fun as well.
I also like the fact that I didn't even have to read the controls to control and shoot the game, since the default arrow keys and Z-X-C model is common for games like this, really easy to get into I must say. People should take more time to understand good controls, and I'd say you nailed it.
Amazing game, truly underrated.