Keys
- Arrow up or space - Fire
 - Arrow down or M - Fire a missile
 - P - Pause on/off
 - S - Start the game
 - Left arrow - Move spaceship to the left
 - Right arrow - Move spaceship to the right
 - Escape - End the game currently playing
  
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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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