If you have seen the movie maze runner. (The first one, not the atrocious second one)
You may have been amazed by... Everything.
Anyway, what if there was a zombies map like a small maze with walls that moved on a timer.
Certain places of the map would open/close as time went on, and getting stuck in a closed off area could mean instant death, or intense danger. Maybe certain areas could have a mini-challenge that might reward the players.
Sounds like a coding paradise, or the biggest coding and zombie pathing nightmare ever.
I don't actual intend to make this, nor ask someone too. Just thought it was a cool idea that I wanted to share.