You use an exploding black bird to fling those blocks across the screen like projectiles, hitting the defenseless pigs sealed within air bubbles. One such level sees you having to take out pigs by using small wooden blocks. Other puzzles are set entirely in space, where the lack of gravity means objects float further and require less force to push them. You might have to use a planetoid's gravity field to curve the angle of your bird to reach pigs nested on the far side, or make use of two nearby fields to send a bird one way, only to have it join the other field and slingshot around to hit pigs floating outside the atmosphere. This results in some incredibly inventive and often challenging puzzles. Each planetoid has its own gravity field, highlighted by a blue aura, which affects the movement of your birds. Rather than lounging on a simple surface, the pigs are spread across different planetoids in space. The twist in Space comes from an inventive use of gravity.

While your choice of birds is predetermined, the progression is excellent, so you never feel overwhelmed by a sudden influx of unfathomable avians. New birds are introduced gradually as you progress, creating interesting challenges that tax the brain in new and exciting ways. New to Space are purple birds, which can be targeted like a homing missile with a tap, and ice birds, which let you freeze parts of a structure, making it easier to destroy. The other feathered projectiles include blue birds, which act like cluster bombs black birds, which explode with a tap and green birds, whose hefty size makes them ideal for smashing through larger structures. There's the standard red bird, which acts like a simple missile. Likewise, there are different types of birds for you to use. Different materials smash at different rates, so while wood is easily smashed with a single bird, steel requires several hits before you can smash through it. It sounds simple, but there's a surprising amount of depth to the action. To do so, you're armed with birds, which you fire out of a slingshot by dragging your finger over the screen to pull it back in an effort to knock over the towers and crush the pigs within. You smash cute green pigs that have neatly placed themselves atop, or in, precarious-looking towers made of wood, steel, and ice. The basics of Angry Birds remain unchanged in Space. Now Playing: Angry Birds Space Video Review By clicking 'enter', you agree to GameSpot's

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