Fun game, but if you play enough when they do Quests, you'll run into a lot of puzzles you've already completed and have to replay them. Which is fine, but you get no points for them and cant advance past other players to try and win the prizes for finishing in the top 3. You may have an entire Quest of 50 puzzles that you get nothing for and wasted your time seeing of you'll eventually get a puzzle you haven't done yet.