Pig Bang 1-4

 Pig Bang 1-4 is the 4th level of Pig Bang.

Difficulty
It's a bit tricky for three stars.

Strategy
An easy strategy for Pig Bang level 1-4 is to send a Red Bird into the hollow wooden square in the bottom-left corner of the tower. It should split ways and pop all those pigs.

Walkthrough
http://www.angrybirdsnest.com/angry-birds-space-pig-bang-level-1-4-walkthrough/