Hot dang, that's really fun. I'm not too good at rhythm games, but this one delivered in a way that made rhythm games more accessible. Though it's also difficult and I'm not very good at it. XP
As an advocate for accessible games, I think I might recommend a toggle for games with lots of strobe. Just to change the UI elements to be a little more stable as the very first screen a player sees.
On a gameplay side, dunno how difficult it would be to implement, but because of the crosshair being tied to the mouse, I think it would be a smoother experience with a continuous camera because the edges are hard to navigate.
Otherwise really fun and well executed.
Viewing post in SLAVE TO THE RHYTHM jam comments
Toaster recommended I check this game out, heck that's pretty good. Really dig this. If I were to trot out my niggles though, they would be that sometimes an enemy can get spawned in my path such that it really feels there wasn't much i could do. Also, as I kept the cursor very close to the ship so i could spin it around in the period between the move and the shoot the fact that sometimes shots go in weird directions when your cursor is close became very noticeable. But that aside, an awesome game.