From the game documentation: To keep it simple and also to minimize the flicker on the screen I eliminated banking and turning. The controls are the "stick" which moves only forwards and backwards (not left or right) and the "throttle" which controls power from 0 to 100 percent. Both controls are simulated by the game paddles. User summary Landing Simulator was written by Jake Jacobs and published as type-in source code in Creative Computing Volume 7, Number 4, April 1981.