I really like the sound, the background sound of game is very good, would be funny if you add quick distant footsteps that play at random intervals to make players extra paranoid. The visuals are pretty good, the flashlight is actually helpful (some horror games make flashlights far too weak), and nothing feels out of place in this game. When a creature gets within range to a player, you could add growls or more "feedback" to make the actual creatures a bit more scary (or something as small as a slight screenshake on death).
The only improvements I'd suggest are maybe more objects/furniture, like a few old pictures hung up on the wall (or to fit the horror theme, evidence from previous victims, like shoes in certain areas), since after running from the creatures, I often had to double check/ask myself "was I just here". It's kinda funny having a determined creature, sitting on a toilet, chase you down to a deadend lol.
Only weird thing I came across was a purple/pink cube chasing me, I believe it was when I took the path to the right or something (but my 2012 laptop is slow, so could be the cause). Overall you did well, sadly, I couldn't find the headset though (about 20 attempts, I suck at horror games ).