"Zombies can't climb," Mara panted, looking down. "But they can pile up."
He planted the Colony Banner in the center of the floating village. This wasn't the world they wanted. But it was the world they had. And on a flat world, the only way to survive was to never stop moving. colony survival flat world seed
Since official world generation often includes natural hills and valleys, players frequently use these methods to create flat surfaces: "Zombies can't climb," Mara panted, looking down