You are on a mission to rescue the solar system. The aliens have launched a full scale attack on the galaxy and are invading planet after planet in the solar system.You have to act fast to save the solar system. Link two aliens of the same type in a clear path to destroy them.Kill similar types of aliens in succession to get more points. Use num keys 2, 4, 6, 8 to move the cursor over the aliens. Use key 5 to select the aliens.