speaking of description, here are the promised diagrams... I wish to note in advance, it's not the fact that the lines occur so far apart, it's all easily fixable ordering. I'll get to that at the end

starting point = gravelly path with nothing around it

Poof! Add a wall

Add an opening in the wall

Whoops, it's been night time
Fixes...
a) would reverse opening vs tunnel. Since the opening is later described as a tunnel, I would make first mention of it "mouth of a tunnel"
b) If "tunnel" appears before "candle" everything is good. If (as is now) "candle" appears before "tunnel" I would mention time of day near the beginning. Once you turn on a light source in a narrative, I must assign the stage evening or night unless instructed otherwise.
c) I suggest a cursory overview in paragraph 1 that contains the fact of i) wall ii) tunnel so that later paragraphs might refer back to these without causingg me mental revisions
As a famous guy I know says, YMMV

