It definitely is an interesting way to learn notes. It's really hard to see what the notes in the orange bubbles are. Maybe if it was zoomed in more it would be easier to see them. That or changing the orange to a darker color so it creates a better contrast with the white lettering of the letters. Otherwise, nice idea.
Thanks for the review - It was originally meant to be a standalone game for a school project, so it's not really optimized for a smaller frame. I'll work on making it better :)
-- UPDATE --
I've made both the guitar neck and the game size considerably larger. You should have no problem seeing the notes now.
newgrounds.com — Your #1 online entertainment & artist community! All your base are belong to us.