The idea is really good, and the game is also built well. However I would like to point out a few things.

When moving I feel like you slide a bit too much and for a horror game precise movement is a really important factor and sliding around isn't really ideal.

Secondly, the general look of the game could be made more appealing with the use of some post processing elements like Ambient Occlusion and Anti-Aliasing.

The text could also have a more appealing font and also pop out more because sometimes u wouldn't know that its there.

Other than that, it's a great idea.