This stage is fairly simple to obtain the three star mastery. Aim for the first helicopter, be careful not to destroy the cart itself. Note: For the treasure map, simply aim the bird at the other side of the boulder, you will automatically receive and unlock the treasure map. However, you will not be able to obtain three star mastery if you go for the treasure map instead.
Power Activation Point
Activate your power somewhere in the middle of flight, this stage is pretty generous on when you activate your power.
First Shot Result
The helicopter brings the cart around, killing all the pigs on the right side of the stage.
Aim for the wooden block at the left structure of the stage.
Second Power Activation Point
Activate the power shortly after you launch your bird.
Second Shot Result
Your shot knocks down the wooden structure, killing all the pigs and net you the 3 star mastery. Please note that the key to obtain three star rating is by breaking enough structures from your first shot.