This stage requires two shot plus plenty of block destruction to get the three star. Your first shot should aim at the top floating platform. The key is to at least destroy all the pigs at the right side of the stage. The only exception is that sometimes you cannot destroy the bottom pig.
First Shot Result
This screen shot shows that all the pigs to the right are destroyed. However, it is OK if you end this shot with the bottom pig alive.
Launch the telekinesis pig into the metal triangle.
Second Power Activation Point
After you land into the metal, tap your power to push the enemy pigs onto the platform.
Second Shot Result
The last power up destroy all the pigs. If you have broken enough blocks for their score, you will be able to earn your three star rating.