Your mission: destroy the intruders. Drop your bombs to knock out the ground based missiles. This will allow you to land for re-energizing. Watch out for the "flying saucers", "mutants" and also the "missiles" from the launching bases. Destroy them for points. You can maneuver your spacefighter in any direction. Be careful you don't run out of fuel. "Freeze" the game whenever it is necessary to hold action as long as you "unfreeze" the game to resume the action. Highest score remains on screen so next player can challenge. Great sound and color. Fun for all the family.