The main complaint with Syberia was the short playing time and lack of challenging puzzles. It is obvious that the game developers took this criticism to heart, because the largest area of improvement in the game over its predecessor is indeed the puzzle design. The most impressive aspect of the game, to me, was the real effort to put a variety of puzzles into the game — not just inventory-based puzzles as was the case before, but puzzles that run the gamut from the relatively simple inventory-based puzzles to more difficult logic-based ones — you may even want to anticipate getting stuck for a while!(Something I never would have dreamed to happen in Syberia.) The addition of more varied puzzles that range in difficulty has helped lengthen the playing time to almost double that of the original game, giving the player much more bang for their buck.