Played and rated!
I liked the concept, it did create the isolation feeling pretty well.
The other aspects of it were lacking I though, didn't really understand how to hide and it would have been nice to have content inside. I think it could be a good isolation vibe game with a story unfolding through some FPS content.
The files you provided are not properly packaged I believe, you might want to look at how to export the game files for upload for your next games.
Well done making this game!