DEFENDER (16K Spectrum)
by Nick Wilson
from Popular Computing Weekly (9 December 1982), page 18

This is a version of the popular arcade game. You must shoot down the
oncoming alien, because if he passes you, you are obliterated. Sounds easy?
You only have 20 shots per 10 aliens! If you accomplish this then you have
an extra 20 shots.

The program is very fast for BASIC, e.g. the landscape movement and the fire
rate.

When you are killed, press BREAK and then press R (Run) and Enter. My
highest score is 14.