The game's atmosphere lies in the large, sprawling map of the two valleys, and the underground. There are many NPCs that move and act independently. In fact, the first time I played I didn't find an important object because some NPC got it first. Some puzzles are quite arbitrary, and I remember poring over computer mags in search for hints.
I remember playing this game in the eighties on my C64... At the time I thought it was really cool. In retrospect, it was a good game, and it was fun to map it all out, but it would look naive for today's standards.