"ROckWrok" features a punk sound derived from Warren Cann's drums and Stevie Shears' guitar alongside John Foxx's hard vocals. It was regularly performed live until Ultravox's U.S. and Canadian tour in 1979, when John Foxx decided to go solo.
The B-side is an early version or demo, or alternate version of "Hiroshima Mon Amour" (named after the famous French movie), written by John Foxx and Billy Currie. It has a punkier sound than the album version of the song. A third version of the song was performed live on the Old Grey Whistle Test the next year, with Robin Simon replacing Shears as guitarist; it was quieter than the "ROckWrok" single version but maintained the rock style, also differing from the synthpop oriented version on Ha!-Ha!-Ha!.
This single, like all the Ha!-Ha!-Ha!-era releases, didn't perform well in the charts.