1. Arrow up or space - Fire.
2. Arrow down or M - Fire a missile.
3. P - Pause on/off.
4. S - Start the game.
5. Left arrow - Move spaceship to the left
6. Right arrow - Move spaceship to the right.
7. Escape - End the game currently playing.
Instructions / Rules
1. If the attacking spaceships comes all the way down to your spaceship
you lose two lifes.
2. Bonus lifes every 10000 points.
3. When the ufo passes - try to hit it, when you do you gain 1000 points
4. points and a new missile.
5. 500 points for completing each level.
6. The attacking spaceships may have one more bullet on the screen for
each level, the game also moves faster.
7. You may have 6 bullets on the screen at any time (and only one.