Fire the first Black Bird into the two vertical stones in the top-left of the structure. This should cause the bridge to collapse, leaving only the left side of the level. A well-placed Black Bird above the second pig should pop them all. If necessary, the Orange Bird can cause significant damage. The unused Red Bird will award you 10,000.
There is a Golden Egg located in this level. Zoom out and you'll see the Golden Egg sitting on a ledge in the top right hand corner of the screen. Notice in the screenshot below, that there is no bird that can reach the ledge, but there is a pile of pumpkins and boulders in the middle of the pigs' structure. The best bet is to place a Black Bird at the bottom left of this pile so that the pumpkins and boulders fly up and to the right towards the Golden Egg. It takes some luck, but you should be able to get it after a few tries.