The audio was created by David Whittaker, who arranged the Bomb the Bass track "Megablast (Hip Hop on Precinct 13)" as the game's background score. The game's subtitle is derived from this track. The arrangement heard in the title screen includes the samples from the original version, while the arrangement heard during gameplay is slightly stripped down.
The development team had been eager to include the track in a shoot 'em up game, with Matthews saying "It's perfect music for a shoot 'em up. It's instrumental, which makes it relatively easy to reproduce on computer, and the title says it all." Rhythm King founder Martin Heath and Bomb the Bass headman Tim Simenon were both avid fans of computer games, and their favourable response resulted in "Megablast" being licensed for the game.