We've got this setup for now, 4 pits for 4 players.
At the bottom is a pipe shaped bridge for them to walk on and be focused on the players behind the bars.
However, the zombies aren't falling down into the pits but are rather digging next to their entrances.
A few that fall in using the pipe bridge as intended, but some are also focused on the wall and door bellow it (there is another door behind that door down there)
Any input is welcome 🙂