Bad Piggies 21-13

Bad Piggies 21-13 is the 13th level of Bad Piggies in Angry Birds.

Strategy
Launch the first blue bird straight ahead, aiming at the first two vertical wood planks. Splitting very late should destabilize the left structure, and collapse. For the second shot, aim the blue bird at the TNT. The resulting explosion should send the last tower crashing the right.