I had a good time listening to this! I think the most effective track for me was the Cavern of Nightmares. I think it does a good job creating a brooding and "uneasy" feeling without being too chaotic for the sake of creating that atmosphere.
I think one thing I wished I heard was more variety in the percussion for all of the tracks. For example, in Sounds of Forgotten City, I wish the drums changed patterns when it was just guitar, bass and drums, signaling a new section.
Well done! It was a good listen!