Phantom of Winter Forest

"An adventurer is travelling around  the world in a hot air balloon..."

"Unfortunately, he was caughtin a blizzard above a snowland, in which his was forced to come down to a forest…"

"He built a makeshift camp to rest. But soon he found that he got trapped here because he lost all the gas bottles used for fueling the hot air balloon..."

"He has to get the lost gas bottles back, not realizing that he has become the target of some eldritch entities wandering in this old, creepy forest..."

Your goal is to find all the gas bottles, survive, and then escape from this foreboding land as quickly as possible.