Thanks for playing and for the feedback!
That's a great idea with the special buildings, and the bound buildings too! I thought about adding a fountain that prevents or slows down fire in neighboring tiles.
I also thought about adding bless cards which will cause rain that extinguishes fires for some time, and other buffs.
A game length category is definitely something I thought about, but I wasn't sure how that will affect the score. Good thinking with having different score categories.
It's cool btw, all feedback and ideas help shape the game!