To obtain the mastery status in this stage, you will have to both destroy enough blocks and kill all the pigs with 1~2 shots. Your first shot should aim around the bottom of the bottom. Your goal is to hit the top right planet of blocks.
Power Activation Point
Activate the power roughly 0.5 seconds after impact. Your goal is to send enough blocks away to kill ideally kill all the pigs. If not, you should at leaset get the bottom right and top middle pig. You can then let your second launch to take care of the rest of pigs.
First Shot Result
After the first launch, this picture shows that the top left, top middle, and bottom right pigs are killed.
For the second shot, aim for the top left planet shown in our picture.
Second Power Activation Point
Activate the power up at the moment where you can push the most blocks towards the center planet.
Second Shot Result
The flying blocks kill all the pigs and you will be rewarded with 3 stars mastery.