Fire the first Yellow bird into the column of TNT at the far right. The resulting damage varies a bit, but the goal is to have a clear shot to the TNT in the bottom-right. If possible, execute this shot with the next Yellow bird. Fire the Boomerang bird head-on into the top-left structure, detonating the TNT within. Of course, higher scores result if you trigger the plethora of TNT in the bottom-left, but that is not an easy task.
This is the 150th level of the whole game.
There is a golden egg beneath the slingshot platform.