I had an idea and this got done faster than I expected. Oops.

This chart was intended to be played with Playstation buttons. I might make an Xbox version (right button B, down button A) and Switch version (right button A, down button B) if I feel like it. Since I got this one done pretty quickly, I decided to make a Hard chart. There is also a "No Rush" version of each chart for those playing on the previous version of Project Heartbeat.

You can check out Pinocchio-P's "Isn't it 'A'" here: https://www.youtube.com/watch?v=LUch7N9Gw28

Extreme - 8.5 (I still don't know how to grade my charts)
Hard - 7 (surely this isn't a terrible underestimation)