The "zzt" sound effect that plays when you plant a new power line was recorded by series creator Will Wright with his voice initially as a placeholder, but was left in the final game as the developers liked it more than other sound effects they tried.
Contributed by MehDeletingLater
Many of the neighbouring towns in the game are named after characters from British Sci-Fi TV shows, most commonly Red Dwarf and Blake's 7.
Contributed by KidDivinegon