So, there is a chest with a reward in the house next to the entrance. To open this chest, in the wilds of the labyrinth you need to find an area with a box. 
This box contains the chest key. But how do you get into a confined space? Somewhere in the maze there are two bonfires that need to be lit. Once this is done, one of the walls will disappear, so you can pick up the key.
But don’t expect to memorize one route, the configuration of the maze and the location of the bonfires will be changing!
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地球末日：生存 Last Day on Earth: Survival Game GUIDE