Aim for the edge of the first cliff where the gray TNT box is. You want to swing by the edge to trigger the TNT bomb on the chain.
Power Activation Point
Trigger the power at an angel to the cliff so that you can get some momentum from the swing. Bounce into the TNT to boost your speed.
First Shot Result
You will fly into the wooden block to the left leg of the structure. Bringing down the house and leave a piece to trigger the bomb on the right. The bomb will shoot the stone balls to destroy the last pig to the far right. You will then obtain the three star rating. However, this stage can be very tricky and require multiple tries to achieve.