Red Planet 5-7 is the seventh level in Red Planet.
It's hard to push the fiery asteroids with the Ice Bird, and three stars score is not easy to reach.
Launch the Red Bird towards the north side of the top fiery asteroid, pushing it onto the steam geyser. The asteroid should land at the bottom left corner of the structure below. Then use the Ice Bird to push the last fiery asteroid into the steam geyser. It should land on the planet below. The resulting explosion should destroy the remaining pigs.