The birds are flying around above you. Drop them down by pressing the rectangle in the bottom of the screen. Remember to press the rectangle with same colour of the lowest bird.
You will have at most 3 bird colours and 3 rectangles to press.
Try to drop as many bird as possible at fixed time by pressing as quickly and correctly as possible.
More than 300 levels for you to try.
Initial levels are easy, but the game get harder and harder after each level.