Very cool. I wish there was a 2D "dungeon crawler" map overlay of some kind so I could see where I am and what direction I'm facing as I progress into the structure. I start to lose my bearings.

I was fortunate to go inside the pyramid as a child in 1980 when I was 9. I remember it feeling quite claustrophobic at the time, and I wasn't exactly big. Once inside you quickly lose the scale of the thing (or at least I did).