The best strategy for Mine and Dine level 16-12 is to loft the White bird to bomb the gap just left of the treasure chest. This is a very difficult shot, but it is possible, so keep trying! Lob the next Yellow bird into the wooden foot of the main structure to cause it to topple leftward and trigger the TNT. Use the Red birds as necessary to clear any remaining pigs. The score in the video below is 103,720.