Pig Bang 1-13

Pig Bang 1-13 is is the 13th level in Pig Bang.

Difficulty
This level is a bit of luck. You should push the blocks to kill all pigs with one bird.

Strategy
The general strategy for Pig Bang level 1-13 is to clear the level with one bird. Fire the Red Bird into either hollow stone squares, launching it toward the other structure. It may take a few tries, but the method is easy to duplicate.

Walkthrough
http://www.angrybirdsnest.com/angry-birds-space-pig-bang-level-1-13-walkthrough/