Instructions/rules - If the attacking spaceships comes all the way down to your spaceship you lose two lifes - Bonus lifes every 10000 points - When the ufo passes - try to hit it, when you do you gain 1000 points and a new missile - 500 points for completing each level - The attacking spaceships may have one more bullet on the screen for each level, the game also moves faster - You may have 6 bullets on the screen at any time (and only one missile)
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