This is great. I would suggest one thing: try to make the scroll speed independent of screen size. I can't read the notes with a fully maximized window.
Edit: found the zoom, but still, I shouldn't have to.
Two suggestions: Definitely make scroll speed a setting (similar to how Rockband 'difficulty' is just them spacing things out further to make it harder) and maybe a slower example? A slower example might be friendlier to new players / more welcoming?
Edit: Also, when I signed up and checked out all the tabs... I ended up getting 'Video not available'. Not sure if that's regional settings kicking in (i.e Canada gets nothing)...