Send Luke toward the bottom of the furthest tower, using the lightsaber to roll the TNT down the icy path into the contraption below. Then “shoot the moon” with Han, firing him nearly straight up so he falls between the first two towers. Shoot the wood blocks to take all the tower down. Popping all pigs but you need more lucky to 3 stars. Score usually not enough for three stars.
See Video Walkthrough.