You haven’t heard of guitar hero? Oh my gosh the best musical game ever??
Here are some links. Playing with a guitar: https://www.youtube.com/shorts/gJedL3O0qeo
This video talks and shows a bit more about it: https://www.youtube.com/watch?v=Xc4YH0nv_90
You could play drums, guitar, etc. The pretend-guitar had the buttons but for example in the Nintendo DS they were just buttons you connected to the DS: https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Fm.media-amazon.com%2Fimages%2FI%2F71ZBiB0cFLL.AC_SL1500.jpg&f=1&nofb=1&ipt=374aae30cdb9ebb88a0911ba58d2f3e061cc1d95fea1255bf1cdb7cffc9e65f5&ipo=images
In short: With a few buttons you can make us play drums, guitar, or whatever you want, progressively harder. Yes it’s not the same mechanics - in your game, we are working with memorization and in Guitar hero we are seeing the button we have to press in advance. But we could still rich an fun melodies with your setting.