If this is your first horror game, it is outstanding! The atmosphere, the story, the mystery... all of it comes together in a neat package. I really didn't know what to expect, so this gets top marks for Story. It got me invested an kept me there through the whole experience.
My only suggestion is maybe cut back on the monologuing in the middle. It feels just right at the beginning, establishing a motive for doing what we want to do. In the middle, I certainly had my suspicions about the characters, so it was hard to put myself into the frame-of-mind that the player was experiencing. At the end, it was a perfect amount of decisions, leading to solid choices a variety of players would make.
Other than that, it's a fantastic game worthy of anyone's time to play!