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 

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)