As others have stated, this is an awesome tool to test a guitarists knowledge of his craft.

It really keeps you on your toes and let's you figure out how well one knows their stuff!

One thing that I would suggest is having an option to angle the guitar neck at a slanted / various other angles because when playing I hardly ever view the neck in the way it is displayed here.

Other than that, this is a great quiz, and I applaud you for your contribution!

Keep up the great work!