First, your pig catches eggs dropped on him by birds flying overhead. Then, if you catch enough eggs, you can move on to the next part of the level where you use a slingshot to shoot those eggs back at the birds.
Designed to be addictive, the game starts out simple and easy, and gets progressively more difficult and crazy as you advance through the levels.
Optionally, you can log in with your Facebook account to see your friends' progress in the game! This also allows you to sync your progress across multiple devices with the same Facebook account.