From the Award Winning Studio Crescent Moon Games and Glenn Corpes, one of the creators of the original Populous series of games, comes TOPIA WORLD BUILDER, a unique world building sim, tailored for iOS devices.
Topia World Builder is a world creation simulation. You become god and shape the land as you choose, by the use of touch controls. Swipe your finger to create mountains, valleys, rivers, and oceans. Watch trees grow, spawn thousands of animals – and watch them live and die on the planet of your creation!
-Spawn various animal types
-Build enormous herds of animals
-Watch predators attack other animals
-Save your worlds so you can edit them later
-Change the color of land, water, sky
-Play in both landscape and portrait modes
Source: The Developer Website.