Sometimes I think I'm the only one who liked the whole labyrinth and its gimmicks.
It was really tough! I've managed to build myself with a reasonable 10 spirit and 200 health or so (probably not too impressive), and I still found it pretty challenging. But in the end, I really liked it. It encourages you to make good choices, and have a decent build. Floor 3 really surprised me with the darkness mechanic. I did find that Floor 4 was easier than Floor 3, not sure if I'm alone in that. All in all, while it isn't the kind of thing you're going to beat easily with your hand in your pants, I personally really enjoyed the challenge.