For this game, all you need to do is use the mouse to navigate a flock of blue birds around various obstacles. If you collect another blue bird, your flock gets longer and a bit more energy get's added to your energy bar in the upper right-hand corner of the screen. You lose all your birds and a considerate amount of energy if you hit an obstacle, and the game is over when your energy bar reaches zero. I know this sounds a bit confusing, but trust me, the game does a better job of explaining itself then I do.