The game world is composed of voxels-cubes, commonly called 'blocks'-representing various materials, such as dirt, stone, ores, tree trunks, water, and lava, which are arranged in a 3-dimensional grid. Gameplay is in the first-person perspective, with the core gameplay modes being survival, in which players must acquire resources to build the world and maintain health (optionally with a 'hardcore' limit, which deletes the world after the player dies) and creative, in which players have unlimited resources, never hunger and are able to fly. The game has no specific goals to accomplish, allowing players a large amount of freedom in choosing how to play the game. It was originally created by the independent video game designer Markus Persson in 2009, before giving the development to Jens Bergensten in 2011. Minecraft is a 3D survival sandbox game developed and published by Mojang, spanning multiple platforms.