Cloud City 4-25 is the twenty-fifth level of Cloud City. To pass this level with three stars, you should pop all pigs and score at least 81,000 points.
Send Luke downward into the first fan, redirecting him into the top-left tower. You don’t need to use his lightsaber; simply smash into the tower and the TNT should explode. Repeat the shot with Obi-Wan, using The Force to push blocks rightward into the hanging TNT. As needed, use Lando to snipe any remaining pigs.
Wait for fan turn to the center. Send Luke to destroy the second structure from the left side, but you should not detonate the TNT now. Bring down to the fan and fan will blow to the hanging structure. Send Obi-Wan with low power to cross the fan. Push the pile of blocks to the structure. Use Lando to finish the level.