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.