A fast-moving arcade game covering three different screens.
Aliens have invaded earth and an endless stream of their
fighters plunder the earth. You belong to a small band of
freedom fighters. On screen one you must avoid the spacemines
to get to the recharging stations to gain ammunition. On screen
two you can use this to shoot your enemies. On screen three you
must negotiate barriers to reach the top where you are rewarded
with extra lives and ammunition. The sequence repeats until all
lives are lost and each time the screens get more difficulty.
Each has a time limit - on screen two, this increases by 50
every time you lose.
At the start of each game you can set and test the sensitivity
of the joystick.
There are nine levels of difficulty which determine the
number of lives you begin with. High score tables for each are
maintained and these can be saved.
A Basic program needs to be loaded and this automatically
loads the main machine code program. Loading caused no problems.