Launch your pig with the goal of being as close to the cliff as possible. Your goal is to setup your boomerang shot at a good angle. Go for a quick shot as soon as the stage starts. You want to launch when the platforms are moving towards the right.
Power Activation Point
The key for your success with this boomerang shot is it has to break the twig below the cliff. By having a smaller boomerang radius, you will be able to break off more items to crash onto the moving platform.
First Shot Result
The jedi power boomerang kills off all the birds on the top cliff, and putting more pressure onto the platforms below. The moving platforms loses the balance and crash into the right. You will have to destroy a bunch of blocks plus killing all the birds with one shot to obtain the three star rating with this stage.