This was cool. I like the atmosphere a lot. The shaders (or maybe animations?) you threw on the game to make the pixels move around is a nice touch. Really great work for a first game. I liked the controls as well, not too often you see 3D + point and click.
I did encounter a bug where the first key I picked up (near the admin doors) came back after I picked up my 2nd key. So that confused me for a bit, but I figured it out. Would be great to see an ending to this game, hope you keep working on it!