False advertising. The ad deceives you. The puzzles are like 1% of the gameplay and done as a side quest to get a small reward for the actual game (city building with time and resource barriers to get you to spend cash). Be prepared to spend money in-game if you don't want to get bullied by other players. And the actual puzzles are of much worse quality. If you don't commit to building the city then the only puzzles you will have left to do are 6 exact same puzzles given to you every 22 hours