Defend the Castles of Hakkas

Imagine castles built up like block or circle in the ancient time in China, which could house up several hundreds of villagers at a time！To ward off invaders, the castles left only a gate and small windows. Villagers lure monsters into the castles, block the gate. Arm up yourself and save the village! - Inspired by the ancient hakkasan castles in Fujian Province, China.