One version is common, at least one other version is rare
 Original game concept & design by Artdink. Amiga conversion by The Dreamers Guild and Maxis. Original graphics design by Yano; Amiga gfx by David Joiner (Talin); Amiga gfx & conversion Jenny Martin, Suzie Green and Bonnie Borucki (aka The Three Heady Piglets). Musical arrangement by Matt Nathan; music by Russell Lieblich and Brad Madix. Localisation support by Keiko Randolph.
 Amiga release requires 1Mb ram for lo-res graphics and 1.5Mb ram for hi-res graphics.