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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