Fire the first white bird and shoot the egg in the first opening. Make sure to shoot the white bird low enough so it could ricochet off the brick castle and fall onto the pig farthest to the right. Using the second white is kind of tricky, but with practice it will work. Fire the bird, but don't drop an egg. Make run into the top right corner of the brick castle.The bricks should get the pig hiding inside it and the white bird will fall through the wooden plank inside and fall on the TNT, killing the last pig.