The Room is where the player begins their quest. Over time, the room becomes a central hub for supplies and resources.
A Dark RoomEdit
The player begins in A Dark Room. The only option presented to the player is to light the fire.
A Firelit RoomEdit
Once the dark room is lit, the room will become A Firelit Room. The Firelit Room can be upgraded to allow the player the ability to build a variety of structures, craft weapons or supplies, or buy resources from the Trading Post. The Room will report its temperature and the status of the fire whenever entered. The fire may be dead, smoldering, flickering, burning, or roaring, which will cause the room to be freezing, cold, mild, warm, or hot respectively. If not stoked for a period of time, the fire will degenerate from roaring to burning to flickering, with the room cooling as it goes. If the fire tries to fall below flickering, Builder will stoke it automatically to keep it lit. Since Builder generates a constant +2 wood per 10 seconds, it would seem to be impossible for the fire to actually go out (and the room to drop back below mild) once burning. But if you save -> export, copy the text, and then import it, the fire is dead and the room cold. After about 30 seconds the room gets freezing, until you light the fire, which will first get smoldering, then flickering, etc.
If the temperature gets too low, the builder refuses to build. Other than this, the state of the fire and temperature of the room do not appear to have any impact on the rest of the game after the builder recovers, apart from causing a constant slow consumption of wood.