Instructions
Cause as much destruction as you can. True, completing the level without using all of your birds is good, as it leaves 10,000 points per bird. Sometimes it's not enough, however, to obtain the all-important three stars at the end of the level. What you earn for getting three stars on every board depends on the level. For instance, doing so on levels 4 and 5 will earn your first Golden Egg. Try to use a bird or two to knock out some structures as you complete the level. For example, if you are using the large, white egg-dropping birds, aim for the base of the structure that holds the pig, not just the pig itself.
Play a few levels without clearance in mind. This won't accomplish much in the way of obtaining three stars, but it will unlock other bonuses if you hit the right targets. Aim for the beach balls, suns and jewels. Also, knock out as many structures as you can without regard to level completion. This will help to earn you such bonuses as "bird slinger" and "block smasher." Once you've done this, then feel free to go back and clear the level, as the bonuses will still stand. Keep in mind that you may have to use unorthodox launches for hard-to-reach targets. For example, instead of pulling the bird all the way left for a launch, you may have to pull down to reach an elevated item.
Explore all of the screens on the game. This includes the credits, the help screens and the like. The ends of credits have Golden Egg level bonuses that can be obtained by simply tapping the egg at the end.