I would being willing to bet you guys have 1 or more artist on your team. The art is amazing!
Unfortunately the sound was much too quit for me to understand and it seems that is critical to the experience.
There were some minor interactivity issues, one being that when I grabbed the letter to read it teleported to the desk after the narration was done. I was done reading it and it was a little annoying to have it taken away before I was done and to have to pick it up again.
Over all it looks amazing!