Game is pretty cool, It reminds me of the once popular game where you go to apartments and there is some lowpoly guy that will chase you with a knife WHHAAH. game has a very nice atmosphere into it. sound choices are good it doesnt break the atmosphere, I like the introduction it feels very mysterious and very relatable if you are in that situation.
suggestions I would like to say is, to add more tension. and dont make it like just one package, how about a couple of package and give tension music, like progressively making the environment more eery, and also think you could make the control just left and right click I think because it doesnt serve a purpose right now. why not make it so that it will be the knock button or something. that is my take, you could integrate a somwhat reward and punishment system and you could have a pretty fun gameloop,
game is fun tried it a couple of times to deliver the correct package WHAHHA. it is pretty cool I got lost on my first couple of playthrough. here is my run. anyway Congratulations on submitting your game, and goodluck on your future projects.