Planets Defender

Published in Digital Marketing PD #229 and game of the "Cassette 50" collection. You must defend your planet from a fleet of UFO's by guiding missiles to them. They accelerate as they come down to bomb your planet. You have twenty missiles to shoot down 10 of the UFOs. You can also use the hyperthrust which gives an extra burst of speed but makes the missile difficult to control. If your planet is destroyed if you run out of missiles. UFOs that escape will return.