Thanks to GT-180, I have acquired a habit of mentally visualizing music in the form of Rhythm Doctor heartbeats.
https://chiroyce1.github.io/image/?ad5ffacd96ed7eae25163d12e5c0a477.png
Here’s the music referenced in the mockup level: https://assets.scratch.mit.edu/get_image/.%2E/8a3f748ed53d7cdf533b9ab3954afbab.mp3