9-12 2 Birds
Aim first green bird at first pig in lookout. Try to pop pig, topple fortifications forward and open path for green boomerang bird to drop in to building.
Loop second green bird into opening in top of building. Try to break though to pop pig at bottom of structure.
(Had a lot of trouble with this level, probably a better method available. Perhaps boomerang first green bird to clear off top of structure and spill fortifications forward into trash bin. Then second green bird either another boomerang or a drop in)
Some High Score Targets:
3 Stars: 63,000
*Top 150: 69,510
*Top 100: 70,550
*Top 10: 74,260
*Top scores in Massachusetts in March, 2011 according to Crystal (a former feature of the Mobile App).
Update #1 (Using Paul’s method, described in the comment section below)