It reminds me of Guitar Revolution or any of those beat/music games.
I like it though. I think you need an app or a web app next. If you have a perfect set of rules for transcribing, it seems simple enough to write a program that transcribes sheet music to tabular, then set the screen to scroll at the speed of the song and presto change-o novices with video game ability can start playing music.
The question is, does this benefit them? Do they learn to play? Or is this like being a master at Dance Dance Revolution does not a dancer make?