An excellent example of keeping what works in a previous installment and fleshing out the world around it. This follow-up has the familiar puzzle elements of the first game, but adds a much more in-depth story and a cast of interesting characters that ties it all together. It continues to expand upon the philosophical questions of the original while not forcing the player to get too bogged down in it all. I think the puzzles may have been a little easier this time around, which is neither good nor bad, but I do feel like I had to sit with the first game a little longer. My one complaint is the lack of real fast travel options--walking around the different areas does get a little tedious when you're really just moving from puzzle to puzzle. Overall, though, if you like the first game then you'll probably dig this follow up.