If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
We are in the future and only a few can have fuel, get to the checkpoint to get more fuel and continue your way. Be careful with the TNT boxes and pick up missiles to shoot the other racers.
Right arrow key to accelerate, left to break, up and down keys will make you move up and down through the three different lanes of traffic. Shoot with the space bar.