Oh gosh....I LOVED your gameplay :') you made me laugh so much with your commentary and the way you kept disagreeing with the MC's words (btw, I'm sorry for the traumatic beginning and the nearly heart attack at 8:49 X°D) and I'm particularly flattered/honored by the feedback your wrote...thank you çwç.
Since you seemed to have some rightful doubts about one moment of the story (that part IS confusing and probably not explained well), I wanted to answer them below:
When the MC accuses the kid of attacking him, he is referring to the whole bonfire incident. He thinks the kid extinguished the fire to take him by surprise and kill him (but probably failed). Then later, in the tunnel, he even sees him with a bloody face smiling creepily....but was this really true?
If you noticed, when the fire goes out, little "flakes" start to fall from above...WHITE flakes. Also, the kid couldn't have been in the tunnel, because he was asleep in his cave.
So, this is what happened: the real bad guys of the story, aka the "other creatures" ("them"), are attracted to the light (=white). Therefore, when you started the fire, you basically created a beacon...and since you were not colored in black yet, you got influenced and saw what "them" wanted you to see.
Hopefully, this may clear things a little...if not, just ask anything and I'll gladly answer ^^