Bad Piggies 21-13

Bad Piggies 21-13 is the 13th level of the 2nd episode of Bad Piggies, in the game 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.