The uniqueness of a chest can be distinguished by its colors. If a chest is rare or epic, it will cost you a lot more coins to open it up. But it is worth it because the more expensive it is, the better the award it has. If you do not have enough coins to buy a chest, use wood to create an indicator that will remind you where it is. This way, you can always return to it when you gather enough money. Monsters in muck will attack anything. Your workplace, storage, furnaces, etc., are all at risk. Defending yourself from them is the supreme priority. If you are unable to do so, you will die, and the game will end.