This game is super cute, I have only been playing it for one day and can already tell that it will take AGES to earn enough money to expand habitats, buy upgrades and penguins, etc.. Unless I watch a million ads (which I have been doing, and still the progress is insanely slow; it's almost unbearable) or use my own money to buy in game money. If it was just a bit easier to make money in the game, I would give it 5 stars. P.S - Ads can be lengthy but not as big of an issue as you choice to watch.