I liked the addition of some additional in universe fiction (the letter and statue poem) which elevate the storytelling and would be hard to come up with on the fly for a GM. The adventure seems to provide a lot of content across both a hex, town, and dungeon which is great!

you might consider using a rumors table to "show don't tell" the goings on of a town. it's convenient for a gm to look down a list and see, for example: farms attacked, mayor's son abducted, druid Cliffwood and ranger Dawrick know the way to the obelisk/temple, elf at inn saw goblins. boom, got it. trust another game  master to know what to do with short hooks. that doesn't preclude the group from running into Cricket and talking to farmers and enjoying the ranger's luxurious black hair. but it does save space when you're limited to, say eight pages or so. :)

You did a good job keeping the location and NPC descriptions to just the most important points. It all feels like part of a much bigger world.

I noticed this booklet didn't have a cover in the game jam list, so I put one together with an image in the public domain (downloaded from oldbookillustrations).

I hope that's helpful and thanks for sharing this adventure!