i think they built the walls first
yes
architect
brick layers
no they did not build any walls
You can build gabions or build sea walls
It's a 'boundary marker' - just as humans build walls around their land to keep others out !
You can build gabions or build sea walls
You simply click on the walls a click upgrade
Build walls around it
you cant
To buy walls, go to the pause menu and select 'Build' and in that section, you can find walls.