"Zap! Your laser fires, but the other starship scoots behind a star back to base for more energy units -- then back to battle!"
Space War is a space duel inspired somehow by the original Spacewar! game programed on a DEC PDP-1 in 1962.
But the Channel F version is much more simpler. There is no gravity evolved. Spaceships are static if you don't move them. You can only fire left or right in a straight shot. It's not possible to fly around the screen - disappear on the left to reappear on the right.
The goal is to turn the energy level of your oponent to 0 by hitting it with your laser. Hopefully, 2 starbases are located on the playfield to replenish your enerly level by flying over them.