Nice theme integration, I really enjoyed that the bullets are bouncing by default, it's already satisfying while the game didn't even start haha
I liked that it's fast pace, you really have to be steady and keep your accuracy, prediction and movement if you want to achieve a good score.
A thing I wasn't doing at first, is rushing enemies at their spawn time to be more accurate and prevent them to flood the screen too much. Holding this strategy for a while is kinda difficult though, you're getting overwhelmed anyway at some point haha
Some enemy spawns were a bit unfair (when spawning on the player), draining the shield entirely in a sec, but it's the kind of expected bug for a jam, quickly fixable!
edit: also like someone mentioned, the player is a bit fast, but that's not the issue imo, I mean maybe, but to me it was more about the velocity on top of that, we can get use to a certain speed if the player stops on key release probably haha
Very cool game, loved it :)