You have 30 seconds to build(try to protect ur character), click to build, you have 20 blocks, and after 30 seconds zombies will come and try to get to your character, you u must defend in that 30 seconds. when there are no more zombies coming at you for a long amount of time, it means you won oh and did I tell you that the blocks have an amount of HP, if get hit by too many zombies, they disappear
This game is extremely broken, Idk why the zombies randomly teleport around the map before they start to go toward you