Yes, even aliens can drive Trucks! You steer a truck on an alien planet to deliver alien cargo to a factory. Try to reach the factory in the fastest time, but also drive carefully to loose as less cargo as possible. Not easy task on the heavy terrain of an alien planet.
Use ARROW UP for gas and ARROW DOWN to brake. Use ARROW LEFT AND RIGHT to balance the truck. At the start of a level wait til the cargo is loaded, then drive.