Three Star Strategy
To complete the level need two birds. First launches the first Yellow Bird toward to the rock above the tower of the central side. pushing the rock to the right side so that destroy the right wood tower and falling into the bottom, striking in TNT box and destroiying the structure of the cavern. Next, launch the next bird toward to the middle of the wood tower in the left side and activate the ability in the middle of the route for more power, the bird pierce the entire structure and kill the pig in half while destroying the wood tower.
The two unused birds then adds an additional 20,000 points to the score, resulting score over 101,000 points.