From the web site of one of the authors, Steve Wallis (http://www.socialiststeve.me.uk/games.htm):
Pick up the objects scattered around the mine and escape up the ladders at the top of the screen. Dig holes to trap the spooks and then fill them in to exorcise them. I can't remember implementing this rather unexciting game, despite my name being included in it as well as Seans, so I presume he did most of it.