You play as a ghost and you get to possess objects and make them move, to scare a group of people out of a house. Or a museum. Or a hospital, a theatre, or a cruise ship. For the most part there's no single answer: you just have to play around and see what works.
Of the old PS Mobile edition, we said "Although it's limited in scope and replayability, Haunt the House: Terrortown is enjoyable and charming enough to make you forgive its shortcomings".
It'll cost you 69p / 99c in this launch week, and then be £1.99 / $2.99 after that. "So that's a 66.6% discount for Halloween," says SFB's Tom Vian. "I am a marketing genius."