Pros: Fun puzzle game with good graphics and cute characters. Cons: After a certain level, the puzzles aren't harder so much as the AI manipulates the game mechanics (e.g., won't give you the colors or items that you need). Purchases seem to affect how much the AI "cheats." Usually, if you quit playing and come back later, it will self correct without you having to purchase. But this type of thing typically makes me uninstall a game eventually.