One strategy for Angry Birds Red’s Mighty Feathers level 24-12 is to speed the Yellow bird into the blue balloon in the top-right corner of the level. This will force the adjacent boulder to swing around and destroy the tower below like a wrecking ball. Finish the level by blasting the TNT of the left structure. The score in the video below is 87,270.
If you have a different strategy for completing this level feel free to leave a comment below.