Finally, I found a game that will move the veins in my brain! Lol. I like this game, so much! It's challenging, I even got stuck on one of the puzzles,at the same, it's fun and exciting. I like that it has a hint button that you can use if you're really having a hard time solving a puzzle. Playing and buying it to unlock the full game is all worth it! I will recommend this to my friends.