Fat Worm Blows a Sparky is action game written by Julian Todd for the ZX Spectrum and published by Durell Software in 1986. Todd wrote the game in the five months before going to university. It was not ported to other systems, and it is the only published game he developed. The player controls a microscopic worm being chased across the circuit board of a Sinclair Spectrum. The game world is rendered with solid vector graphics.