StrategySend Han towards the first pig. Aim your blaster at the junction of the two angled steel planks of the top left structure. Your blaster shot must be perfectly horizontal to achieve the desired ricochet pattern: ricochet on top-left, bottom-left; bottom-right; top-right and detonate the TNT box on the other side. The southwestern pig will be popped by the tiny iron blocks.
See Video Walkthrough.