4 different colored lines swim from the left side of the screen to the right. They’re racing to the edge. The player has no input except for a speed boost, on cooldown, which instantly kills the player if overused. The lines’ paths are randomized according to their unique attributes (speed, turning, boosting, heating, cooling), and they go wherever they want to go, forcing the payer to be quick/lucky/smart/strategic about when to use their limited speed boost. If one racer crashes into someone else’s line then that racer is eliminated, Tron style.