One version is common, at least one other version is rare
 Game design by David Bishop and Tony Crowther. Coding & music by Ross Goodley. Graphics by Tony Crowther. Level design by gaming icons including Jeff Minter (Yak), Andrew Braybrook, Geoff Crammond, Jon Ritman and Dave Korn (Ubik).
 Magazine Publisher: Amiga Power no. 1, May 1991 [downloadHERE].