It sounds like a purely audio production to me. According to the Kickstarter, "The term 'audio movie' was first popularized by British director Dirk Maggs (Hitchhiker's Guide to the Galaxy, Neil Gaiman's Neverwhere and The Sandman) to describe his cinematic approach to audio storytelling ... Audio movies are perhaps the most elaborate type of audio fiction, a form where exacting, cinematic detail goes into every moment of the production." I guess they're picturing it as being somewhat bigger in scope and detail than a typical radio play.