The warning screen is done wonderfully. It was hilarious and scary (for the case of killing a children just for the sake of the bragging himself).
The over-confident made up crap at the intro is spot-on and awesome.
But then, fake choices that doesn't change the ending is one of the worst thing that can be included in a game. (The clock does nothing too, I thought I need to complete the game within the time frame given, I was wrong.)
It's okay. Not amazing. But well done for a movie. It isn't a game. It's an interactive movie.