Amazing game! I love the graphics, the music, and the mind puzzles! I just earned level 2 and cant wait to play it. I'm giving three stars as of now because I've only played level one. You can watch ads to boost the running skill and get more eyes. You don't even have to pay money to unlock the other levels, you just have to play through levels to earn coins in game! You have the opportunity to buy other levels if you choose! You can even earn coins if you fail the stage! So worth the download!!