>>211813028I think the director wanted to leave it ambiguous how much was magic and how much was the characters being stupid or going insane.
People have died lost in the woods, not in middle of the nowhere but just a mile away from outer suburbs.
Almost all of the movie could be rationalized as some psycho (wo)man messing with teens lost in the woods although the weird looking mind control lifeless standing in the shack at the very end hints at magic (even then the guy was captured some time ago so you could get the same expression with opiods).