You have to launch a space ship to travel in space, land on the enemy planet, and destroy rocket launchers using a robot, that is equipped with a laser gun. -Press up/down arrow keys to move the spaceship in up/down directions. -Avoid hitting the rockets and asteroids during the space voyage. -Your satellite is attracted due to gravity pull by the other orbiting planets in space. Avoid hitting them by moving away from them. -After the satellite lands on the enemy planet, press the up/down arrow keys to move the robot in up/down directions, and to avoid enemy rockets. -The laser gun automatically fires and destroys the enemy rockets, asteroids and rocket launchers.