The worlds are very impressive. They look a lot like certain parts of Japan, is what I've been told by various people who have lived there. They definitely set the feel for the game and era. The Hazuki Dojo, Yamanose, Sakuragaoka, Dobuita, and Yokusuka Harbor. The areas are pretty large, but that's the extent of the discs.
Music is pretty good.
I can't remember anythign standout, it all pretty much blended in very nicely. There are a series of cassette tapes you can pick up and play, and enough jukeobxes spread out around the world so that if you've got a hankering for any of the BGM songs, you can play it. There is some slowdown evident especially if you're driving the forklift in the snow. It gets highly annoying when you're rushing around trying to distribute cargo, and you're stalled because the path a cat is walking intersects yours. The cat isn't bright enough to get out of the way, and you'll spend 15 minutes of game time waiting for it.