Utopia 4-6

Utopia 4-6 is the sixth level of Utopia

Strategy
One strategy for Utopia level 4-6 is to send the first Blue bird toward the top-left bumper, splitting late. The level is about a bit more luck than skill after that, hoping the birds push kernels and popcorn into the pigs to either pop them directly or force them into the gravitational field on the right. Using two birds is still sufficient for three stars, so don’t be afraid to take another shot maybe toward the bottom-left bumper if necessary.

Walkthrough
http://www.angrybirdsnest.com/angry-birds-space-utopia-level-4-6-walkthrough/