I could be wrong but I don’t think mushrooms will help you learn piano

Synthesia is an app for learning piano that works kinda like Guitar Hero. It's a play on the words synth and synesthesia.

Synthesia [0]

[0] https://synthesiagame.com/

Doh! what's the name for when people can see colors for sound?

Synesthesia! The app name is clearly inspired by that word, so it makes sense the wires got crossed

I want you to know from the bottom of my heart that I love your comment and didn't downvote :-)