It's a really cool story idea with potential! As others already mentioned, the lack of sound really stands out. I think you don't even necessarily need music for this but to emphasize the monotonous work just some room atmosphere and the continuous sound of rewinding tapes coming from the work room would already add a lot. Also, I felt to give it more of a point&click vibe it would have been nice to have an inventory to see the items you picked up and having to use them on things. For example, select the key from the inventory and use it on the door rather than opening it automatically to give the player the feeling that he actually did something. But it's a good start, keep it up!