Haven't seen anyone else mention this in the comments, but Synthesia is something I used in the past https://synthesiagame.com/ https://synthesiagame.com/ Ther

Haven't seen anyone else mention this in the comments, but Synthesia is something I used in the past https://synthesiagame.com/ https://synthesiagame.com/ There's a free trial, but the $29-39 for the full-featured paid edition is well worth it. I was able to connect a 88 key electronic keyboard, load my favorite custom MIDI files (when I could find them) and try to play along with it. Not knocking anything you've done here OP :) just pointing out another one you can check out for features etc, and also if anyone else is looking for something similar.