Island Tribe 4 Level 15

It's pretty dark inside, isn't it? Activate magic plates to levitate stone plates as a bridge. Activating a magic plate requires 4 crystals. Extinguish fire on sawmill and upgrade it twice. Build the stone bridge and collect resources. Build the lower wooden bridge and clear the way to well. Build the middle wooden bridge and collect everything in the path. Upgrade camp and well. Build 2 upper bridges. Upgrade cow farm and grain farm. Upgrade both of them again. Buy bandages from trader and drive away mummies. (You have to pay 5 grain for 3 bandages.) Repair wooden bridge and quarry. Upgrade cow farm and grain farm. Upgrade quarry and collect everything in the map. Activate 4 magic plates to drive away the last mummy. (You need 10 cow milk for 4 crystals. Buy crystals twice.)