Solid mine crawl with dangerous, avoidable, and funny encounters. I like the ecological theme. I wish I knew more about the town since the river spirit feels more like a victim to me and I'd want the town to get some comeuppance, but I'm not sure you have the space for it. Nice map drawing, though I wish it wasn't so far from the keying since I had to do lots of scrolling. The basilisk, earth elemental, and molemen make me wonder how this town was able to mine at all! Good work.
Once judging is done, take a look at your affinity file, you might be able to resize it to A5 so you don't have all that white space.