Holy crap, this was really terrifying. The creepiness ramps up to pure scare towards the end. The darkness in the game was just so.. Enveloping and thick and really captured the fear of turning the lights off and roaming in the dark.
The sounds were really, really well done and the environment had enough things to make it seem full and also to keep looking at random items and wonder if that was the monster you might have seen.
The only thing I found a bit sudden and different was to go through the house and take photos of the creature. The placements felt random and there wasn't a proper indicator as to where it was.
Other than that, I think that the placement of the creature in the dark where the plant is supposed to be near the bedroom was absolutely great and I really thought that it was a plant later on, which just shows that everything was ramped up well and made the game really creepy. Great job on it and good luck for future projects!