Your car drives forward by itself. You only steer.
Phone: touch and hold the left half of the screen to steer left, the right half to steer right. Keyboard: left and right arrow keys, or A and D.
Stay on the road and dodge other cars. Leaving the road or hitting a car slows you down.
Beat the clock: drive through each checkpoint banner to add 24 seconds. When time runs out the game ends and your distance is scored. Your best distance is saved.