I agree with the other reviewers about the downsides being energy depletion and low amount of stars earned for passing each level, but that is part of what makes it a challenging and enjoyable game, it has a much more interesting story than the usual match 3-style games as it's part mystery and adventure. It is slow progress, but the energy depletion forces you to not stay on the game all day, but take breaks away from your phone screen and get things done in real life. Good for the slow gamer.