Hook: the day/night split and the gate-keeping job.
Features:
Interrogate three visitors a night from about twenty questions.
Visual and Audio cues and evidence give wolves away.
Heart meters track how happy each animal is.
Calamities arrive every few days.
Thirty nights with story endings along the way.
Demo: the first five nights are free and your save carries into the full game.
Closing line: trust no fleece.