Apparently, recording screen audio on macOS is an extremely daunting task. There are absolutely no easy solutions.
Since I'm here, I'll give an update on my Rhythm Doctor level ideas:
Everything Black: developed to a complete product by Gilbert
Peer Gynt: made by Gilbert
Final Hope: made by Gilbert
For Me: planned, delayed due to calibration issues
The Daybreaker Double: delayed due to calibration issues
No Hints Here!: planned
Teleporting: made by me
Catchy Song: made by me, partially complete
Colorblind: planned as a vague concept
The only thing missing is the sprites