First off, the sounds & aesthetics in this game are unmatched perfection. I also really like the lack of daily tasks, and the fact that the ads -- while they appear after every level -- are typically very short or mutable. What I don't like are the constantly changing game modes. While a new mode every level keeps things fresh, I really would rather have a game I could just sit back, relax, and play the same mode for hours & hours whenever I wanted.