This is the game version of a dungeon-synth cassette given to you by the guy who has a wizard painted on his van.
It has an easy-to-understand ruleset that offers a little more depth than many other micro-rpgs. However, it does carry the same caveat that while it offers rules, it probably isn’t enough material for a new GM: without a decent understanding of the dungeon-delving genre, I think a GM might flounder a little.
I definitely recommend it for a lightweight, quick ruleset when you need a session on the fly, or maybe for a short beer-and-pretzels kind of campaign.