There's a second ball. Calamity ensues.

I was thinking of making this playable through the Rhythm Heaven Remix Editor, but I really don't think anyone can keep track of the ball without visuals, so I decided against it.

I used Rhythm Heaven Remix Editor 3 for audio: https://github.com/chrislo27/RhythmHe...
I used Heaven Studio for visuals: https://github.com/RHeavenStudio/Heav...