Traveling when you are a bird that cannot fly involves many dangers! Lay eggs to gain height and avoid hitting the barriers and hostile animals (eagles, snakes, ...). By limiting your clicks to what is strictly necessary, you will achieve "Perfect" then reach, after 3 times, the "Square Bird Fever Mode" during which your bird will be rabid and fire projectiles. The game features two modes (levels and endless) as well as different skins to unlock in order to modify the appearance of your bird and background.