The first shot for you to get the three star ranking can be pretty tricky. Launch with the angle shown in the picture. This shot has to be done pretty exactly.
Power Activation Point
Activate your power when you are about to fly under the flying platform. With the three splits, one of them hits the flying platform, one fly past and break the chain, the last one hits the fan and boomerang back to break the first building.
This shot is pretty tricky and will require multiple tries for you to pull it off.
First Shot Result
After the shot and some chain reaction, all of the pigs will die except for the ones at the back.
Launch your next jedi bird to towards the ice block near the back.
Second Power Activation Point
Use your light saber when the building blocks are in your range.
Second Shot Result
The last shot picks up the remaining pigs and you will earn the three star ranking mastery.