This fun game from Penn and Teller puts you in the seat of a passengerless bus on an otherwise empty and featureless desert road. Your goal? To drive for eight solid hours to Las Vegas, without stopping. There's no pause button, and the bus pulls a little to the right, so you have to sit in front of the screen actively driving for the full eight hours.
It's truly one of the greatest games ever made. Give it a try in your browser here.