Our strategy for Angry Birds Bad Piggies level 20-11 is to aim for the TNT on the far right side of the level. Do this by flinging the yellow birds towards the ropes holding up the helmet pig’s platform. This can take a few tries, but eventually you’ll blow the TNT. For the next shot fling the red bird straight ahead at the top right portion of the closest wood beam. The red bird should take out the two right pigs, while the falling debris should take out the middle ones. The score in the video below is 65,520.
Note, this was previously Angry Birds Bad Piggies Level 19-11. Rovio shifted some chapters around in the v3.0.0 update. More info on the v3.0.0 update can be found here.