(Slight spoiler ahead, be warned.)
That was a great story! The navigation through key words, the deciphering of the letter, the hidden key—every interaction works really well to invest the player in the story, which is very well written. The background sounds and interaction sounds, like entering the reception center, were nice additions to a more immersive experience.
I think it could be expanded to other interactions tho (phone, elevator, emails...).
It was a great experience. I haven't tried every game yet, but yours might be in my top 5 of this jam.