Bad Piggies 23-14

Bad Piggies 23-14 is the 43rd level of Bad Piggies in Angry Birds.

Strategy
Send Stella between the first two structures. The bubbles should topple both towers and detonate both tnts. Finally, send a second bird towards the top horizontal stone block on the middle structure, and trigger the bubbles upon impact. The tower should collapse to the right, destroying the remaining pigs.