If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Your objective, space adventurer, is to finish the ultimate rally course, The Moon. Everything is against you here, including gravity. Do you think you can do it? In Moon Rally, you're in control of a lunar rover. You have to beat not only the rough terrain of the Moon, you also have to beat the gravity. Try to beat the 18 levels of the Moon ultimate-rally cours.
Up Arrow Key - Accelerate.
Left / Right Arrow Keys - Pull Back / Forward.
Down Arrow Key - Brake.