Gridrunner is a fixed shooter video game written by Jeff Minter and published by Llamasoft for the VIC-20 in 1982. It was ported to the Atari 8-bit computers, ZX Spectrum, Commodore 64, Commodore PET and Dragon 32. From Wikipedia
The interactive documentary celebrates the career of Jeff Minter, a pioneer in the video game industry, and his unique contributions over four decades.