I absolutely loved all the games! The quality is amazing and the story lines were well thought out! The Intermediate & Advanced levels were definitely more difficult and needed some walkthrough assistance. I can't wait for the next game! Well done guys, it's awesome!!! Some people complain about the key and star system. I would like to point out that this is an amazingly well developed game & it's FREE! Just have a little patience & watch a few short adds or pay. It's definitely worth it!