CV8309-CityDefender-P92.TAP
by Neil Bell

The aliens are coming, the aliens are coming! Not again, you scream! Yes,
we say, and you'll enjoy it or else! In fact this is a good Missile Command
style game with interesting graphics and a nice line in game action. The
idea of the game, as you probably know, is to position your sights - a
white cross - over an alien moving downwards towards your cities with only
one intent. To blow them all up! You stop him by blasting him before he
blasts you. You have three laser bases to play with - but only a limited
number of laser blasts - so be economical with your laser finger. If an
alien manages to reach one of the cities then the game is over. Full
instructions are included in the program.

VARIABLES.
x,y:    position of sights
sk:     level of difficulty (altered after 10 aliens have been destroyed)
sco:    score
nn:     number of aliens which have descended
na:     laser blasts in base 1
nb:     laser blasts in base 2
nc:     laser blasts in base 3
a,b,:   position of alien

