Interesting idea. Sadly I didn't recognize any of the songs, which made it hard for me to tell if I did it right or not.
Also I think it's a little confusing that you have to go up on the keyboard to play the notes that are on the bottom. Maybe it would have been more intuitive if it was the other way around.
At the bottom of each song’s menu, there’s a button called “CREDITS”. Selecting it will take you to the originals. You can also use “AUTOPLAY” or “TRAIN” to see how it’s supposed to sound when played correctly.
I ordered the notes by the pitch so lower pitches are at the bottom. When developing I tried a bunch of things and this was the most intuitive considering the constraints. It does get easier after some practice.
