Bad Piggies 21-3 is the third level of Bad Piggies.
Strategy
Fling a Black bird into the top-left pile of stones, clearing out the way by using the blast right after it hits any objects to blow the blocks. You should destroy the brown bag to have more blocks blowing away in the next shot. Fire the next Black bird through the gap, clearing the glass structures on the right side. Finish off in the bottom-left, and make sure the bridge had fallen in the middle. Or you can finish off the bottom-left with the second bird and clear the glass with the third bird.
Video Walkthrough
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