Utopia 4-18

Utopia 4-18 is the 18th level in Utopia.

Difficulty
Quite hard to clear both side of fortress.

Strategy
Toss the Orange bird south, leveling the entire southern side of the main structure. Be sure that the pigs in the popcorn pile are popped by unidentified flying debris. As needed, target wooden blocks with the Lazer bird to finish off the level.

Walkthrough
http://www.angrybirdsnest.com/angry-birds-space-utopia-level-4-18-walkthrough/