Our strategy for Mighty Hoax level 4-5 is to fire the Red bird into the first stone block. Not much damage will result, but you should pop the first pig. Shoot the Blue bird through the top of the ice blocks, thereby taking out most of the left side. Use the Yellow bird to level most of the structure, then place the Black bird in the right side of the main tower. The explosion should clear all remaining pigs. The score in the video below is 93,310.