so many things can be done.
If this idea can be done right it would be awesome. I idea is great and much like other Ngers we expect a trap, puzzle to be solved and gore. Here are the things that I would think that would make this game a serious hit.
1. Voice actors. Don't get me wrong I don't mind reading text. But to enhance the intensity you need a good "Jigsaw" voice actor.
2. Realism. To really get this game to fly you can't have it too cartoony. I could see this game in realistic 3D kicking some major ass.
3. Multiple choice/ending. An in-depth story with plot twists and multiple endings can keep the player guessing and surprise them where they live or die at the end.
These are my suggestions. This has promise to be a great idea for a game but it needs to be done right otherwise it will be blamified.