Gravity Bird

Gravity Bird
The Gravity Bird can work against gravity. This is useful on levels where the piggy's fort is upside down. This is also useful in Angry Birds Space: Rising Trouble.

Angry Birds Space: Rising Trouble
I'm not supposed do do this on the page, but Angry Birds Space: Rising Trouble is the prequel to Angry Birds: Space!

The bird's are giving their eggs baseball caps. This may either be because of the heat, or to make them look good. Suddenly, a portal (yellow and blue) pops up and birds (carnivores) start popping out of it. The birds want the Angry Bird's eggs. The birds defeat them and they retreat into space, but the Angry Birds go after them to get their eggs back. This game did not have anything like freefall, or gravity circles. It was classic Angry Birds except on circles.

Surprisingly, the birds have developed a device which allows their buildings to not fall. So either their buildings are on the side or below the planet, it wont fall unless you smash the bottom.