Great idea well done.
Random unlabelled floppies is a great way to make the player use time or add tension or curiosity and revelation to a horror game.
This could easily be part of something bigger and very nerdy.
This is only intended as a short game for 1 concept, but I would add a waiting room section you have to wait in first.
This could help add more atmosphere to set the scene.
This gives the opportunity to misdirect or reinforce and protract the tension in the following section, due to having the chance to put cues and clues around the room, and due to the look of the room.
eg. coming from a dank waiting room with missing persons posters would reinforce the harsh bleakness. Whereas coming from a clean bright waiting room with marketing and overblown promises would make going into the terminal room more shocking.