Terrible aliens are going to attack your planet, and you are to stop this approaching disaster. Select your personage before you start this risky challenge. Then get armed with some weapons and start your dangerous trip. You will see various obstacles and high barriers in front of you. Make sure to use all controls properly to overcome these. You can make your personage jump high to avoid some of these. And whenever an enemy appears on the horizon, make sure to open fire in time to kill it!