It seems like puzzle rooms are only in pyramids... if this is truly the case, I would suggest adding the chance to all buildings to add variety. Also, can we have some more variety in terms of the puzzles? The idea is great, but it just needs to be fleshed out a bit imo.
As for pyramids, I feel that the maze rooms should only be in stash rooms. Too many of the rooms are huge mazes.. it just feels monotonous. I would also love if doorways were a different color.. with the gravestones being green, it is very hard for me to find the doors after exploring.
On a separate note, I'd love if there was more of a push/motivation to move between tiers. It is so easy to grind at tier 1, it makes me stubborn to move to tier 2.. and then it gets monotonous.. sure, I am doing it to myself, but there should also be a bit of a game push to not hang around indefinitely imo.