Brain vs Brawn
We made 7ft guitars the had a ladder of RBG LEDs up the neck. The bass guitar was the brawn in which we made a high striker carnival game with a drum pad and a mallet to strike it with. The second guitar was an EEG hack that gave readings out on how hard you could concentrate on a specific task. Each guitar gave a reading up the neck of the guitar relating to the force exerted or the concentration level of the participant.
Here is the code in case anyone wants to make there own version.