Follow these instructions to get 3 stars on Mighty Hoax level 5-16
1. There are four levels of platforms where piles of boulders are situated. Aim the first bird at the tip of the triangular stone on the highest platform. This will send the boulders flying on the ice castles.
2. Do the same process with the next highest platform.
3. Clear the trajectory by aiming at the next platform.
4. Once cleared, aim the last bird at the remaining pig with a moustache.