One version is common, at least one other version is rare
 Written in 68K assembly language (ASM) using SEKA assembler. Game design by Laurens van der Donk. Coding by Roger Schuttelaar. Graphics by Arthur van Jole. Original music composition by Johannes Bjerregaard and Amiga music arrangement/conversion & sound FX by Charles Deenen of the Maniacs of Noise.