Tributes to other popular titles such as Mario and Space Invaders pop-up courtesy of special Eggsteroid collectibles. There is even a form of the boss fight at the end of each episode. While Rovio promises regular updates, as in previous Angry Birds games, players can feel like more of a challenge purchase the danger zone, release 30 extremely hard levels. The majority of his players with the basic content package of 60 levels.
