Alien Invaders
1984 Grisewood & Dempsey Ltd
Written by Patricia Grady

GAME NOTES

London is in peril!  An Interplanetary Battle Fleet from Mars - whose 
inhabitants are infuriated by our claims that their planet is dead - has 
attacked.  The Ministry of Defence is asleep, so you have to defend the 
city with just one missle launcher.

You can move the launcher to the left using capital Z and to the right 
using X.  Press F when you are ready to fire.

The Aliens descend cautiously at first, but be on your guard.  If you let 
a single ship through, London will be devastated.

During the game you score points for each invaders you hit - more points 
for a ship high in the sky than for one close to the ground.

If you want to make the game more difficult, try replacing (N+2) in line 
200 by (N+1) or reducing the 4 in line 290 to 3, 2 or 1.
