Red Planet 5-6 is the sixth level in Red Planet.
The towers in the second planet is a bit tricky. 3 stars is quite hard.
Launch the first Red Bird into the south fiery asteroid, pushing it in the gravity field of the either planet. The resulting explosions should destroy most of the pigs there. Then launch the Blue Birds towards the top fiery asteroid, splitting late. This should take out the pigs on the left planet and also push the asteroid into the right planet.