Think You're Good at Mario? Try Playing With Your Eyes
Now that you've mastered hand control, here's a new challenge for you. Try playing Mario using just your eye movements. The video below describes how the system works, and if you're feeling extra ambitious, scroll down for two HowTo videos, paired with (1, 2, 3, 4) build details.
Eye Mario video guidance: HowTo make a biomedical analog circuit & HowTo make a custom daughter card circuit.