Ok I finished your demo.
1. Great use of music during parts when it is needed to build up tension or to take off tension and give the player a sense of accomplishment.
2. Less supplies
3. A variety of scares from false scares to outright disgust.
4. Immersive
5. Utilizing the sanity meter to enhance the atmosphere and mood.
The only thing I can see wrong with it is that you may have scared the player too much in the beginning...but only if you are planning on making this a extremely long custom story. Most of the time the bomb ticks before being set off.
Other then that I'm extremely happy with the quality of this demo.