I played through the game some time ago (meaning few months) and it was fine, no scary entities and levels were somewhat hard to get past. Saw a blog that wanted to see if a gun was being added which, in my opinion makes 0 sense. I get if it was a joke but there isn't a point of a gun being added if the game has nothing to use it on. Yes the creator can add an entity to use it on but then it's gonna be every other backrooms game, where you noclip with only a camera and have to find a way out while surviving some spooky stickfigure from a series on youtube. Sounds reverb off of walls if its thick enough, so a gunshot which is insanely loud would cause the sound to bounce off the walls constantly. The sound would continue until the energy ends up dying out, however it only alerts entities to your position. You may be asking: "Oh well if a gunshot is gonna be so loud why can't I just put a suppressor on it so it isn't?" While yes it would work suppressors only make the sound more bearable, not like a bottle cap falling onto a desk.

If the creator ever does read this, please don't add a gun in the next game. It just makes it not scary.