The file
The trackball made it. You rolled a heavy ball to move your shooter along the bottom of the screen, and the pastel mushrooms and the split-second twitch of the spider made Centipede the prettiest and meanest cabinet in the row.
Dona Bailey was one of Atari's only women programmers, and the game's palette and pace drew a crowd the shooting games didn't. The Millipede sequel never replaced it.
Sources: Wikipedia — Centipede (video game)