That candle puzzle you solved upgraded your smoke to a greater smoke! You get the smoke whenever you reach a boss without losing a candle. The greater smoke is the upgraded smoke card, it does 1 damage and has 2 extra health so it's a pretty decent free damage card!
I'm aware there's more to the cabin that meets the eye, but am lucky enough I don't know how or when. Plan is to do a RU-vid Live when we complete the game first time, with challenges and attempts to find what I missed during first playthrough 😁