Death Star 2 6-21 is the twenty-first level of Death Star 2. To pass this level with three stars, you should pop all pigs and score at least 89,000 points.
Send Han towards the wave of the first force wave platform. Shoot the first tower and the first chain. This platform will blow the middle tower and cut the chain that attached the second platform in the left side and the second platform will blow the final tower.