It's the end of the world, but turn that frown upside down, because the apocalypse has never been so cheerful! In this free iOS simulation, you're in charge of rebuilding a utopian society in space... by yourself. Fortunately for you, you've got an endless supply of incoming clones, and a bunch of genetic material to mix and match to create more jobs and more buildings. A vibrant pixel style and cheeky sense of humour make this one light, addictive casual sim that's hard to put down.

The world of creativity games continues to expand, but this time it's on mobile devices! Growtopia, a combined effort from Robot Wants developer Hamumu and Dungeon Scroll creator Robinson Technologies, strips out a lot of the complexities often found in creativity games like Minecraft or Terraria, allowing you to build and decorate your own little world that goes wherever your mobile device goes. Bored on the bus? Growtopia! Don't wanna listen to your boss droning on? Growtopia! Entire evening free? GROWTOPIA!

It's been a while since we've seen serious activity from Kloonigames' Crayon Physics games. From its debut as an experimental project in 2007 to the release of Crayon Physics Deluxe a few years later, the crayon-drawing physics/puzzle game went from being a neat-o toy to OMG WANT MORE. And now, not too long after its initial mobile release, the game has fully grown up and is ready for its HD iPad debut, sporting a few nice extras along with the visual upgrade.

The Sandbox is a creative elemental puzzle game for iOS by Pixowl. It mixes puzzles and challenges with good old fashioned elemental interactions, exactly the kind you would find in classic browser games like Sand Sand Sand. Guiding the all-powerful element dropping utility that is your finger, you can mix dozens of unique elements to create fantastic reactions, functioning machines, crazy Rube Goldberg-like devices, or just paint pretty pictures on your screen. There's plenty of room for creativity, but also a fair amount of thoughtful challenge as well!

The cute and captivating sandbox meets simulation game Clouds & Sheep is going to be the number one reason you can't keep a full charge on your Android device. Combining elements from games like Tiny Tower, Pocket God, Virtual Villagers, and more, you are put in charge of a pasture of lovely little sheep, your only goal being to make them happy and make them multiply. To do that, you'll take control of the weather, utilize dozens of items, and complete challenges that range from zapping things with lightning to rolling sheep into rocks!

We all know Minecraft by now, the massively cool 3D sandbox creativity game that lets you explore, craft, and build anything you like. Then there's Terraria, a game that took the same formula and flattened it into a 2D sidescrolling game, adding combat and some other nice extras in the process. Both titles have spawned similar games on numerous platforms, but so far the mobile realm hasn't been a fertile ground for the sandbox genre. Until Junk Jack came along. This 2D pixel-gorgeous game takes the all-too-familiar crafting, digging, and exploration formula to your iPhone, iPod Touch, and iPad, bringing with it an entire world of possibilities.