Neat vision mechanic. I'm not sure if the "enemies" were a threat or not. If they were they were very easy to stunlock before they could do anything. Twice there was a loud stinger sound, but I have no idea why. I turned around and saw a chair rocking, but I wasn't looking towards it when the sound happened, and the second I have no clue why it happened.
Very cool idea though. I could see this kind of mechanic being used in a full horror game.