Really great atmosphere in this game-- like other people said it creeps the hell out of you, and where I think this really gets ahead of other point and click adventure games is the puzzles are relatively straight forward but you can complete the game without doing all of them. The multiple endings really encourage you to explore the ship's mysteries, and when you find out the horror there's really a huge pay off for such a short game.
Probably one of the best narratives in such a short game that I've experienced in a while.