One of my favorites of the jam so far, very fun gameplay loop and I love the visuals! Every use of color with the limited palette pops really nicely, and use of slowdown really helps give players a satisfying feedback to their actions.
I do wish the camera was a bit more zoomed out, because I feel like bullets can come a bit too quickly with not a lot of time to react especially in the later levels with more enemies.
But, great game, I'd love to see it expanded on if you continue with it. I got to level 16 and I'll probably play a bit more even after the jam :]