PianoBooster

Hello,
I just discovered a very promising app for music and/or education - free and open source, available for WIndows, MacOs and Linux!
https://www.pianobooster.org/
Citation from the website header:
PianoBooster is a fun way of playing along with a musical accompaniment and at the same time learning the basics of reading musical notation. The difference between playing along to a CD or a standard MIDI file is that PianoBooster listens and follows what you are playing on a MIDI piano keyboard.
It should be very worth publishing as a portable app!
Thank you!