Nice music, solid gameplay. I liked that the movement happened regardless of input instead of punishing me for missing a beat. The last level was super neat and very dynamic. It was almost spooky. If you're planning on expanding the game do more like that.

There were a couple of unimportant bugs I ran into. The player movement arrow didn't always line up with the direction of movement at the start of a level. It always worked fine after an input. After unlocking a new level, navigating to the left side of menu and pressing left changed the selected level one to the left of the latest unlock, which was weird. Pressing right on the right side of the menu didn't wrap anywhere.

I think I'd prefer if the discs that launched from the center in + and X patterns gave little guidelines as to where they were headed. I died a lot because I didn't notice they had spawned and I was in their path. Can't say that's definitely a good idea, but perhaps worth investigating.