Gameplay is there but it's useless: there's absolutely no changes in the narrative, at least none in my two playthroughs were I intentionally tried to do as differently as possible the various events. There are also no secrets to discover: I looked around and there was nothing other than the obvious.

Most importantly, for if this wasn't the case one could forgive this walking/sitting simulator, the story itself is poor. It's not the absolute worst twist I've seen on this stock horror cliche, but at the same time it falls into the pitfall of overexplaining it in the ending.