A world is encoded like this: <spawn x> <spawn y> <world type (forest, volcano, or mushroom)> <row> <row> <row> <row> <row> <row> <row> <row> <row> ... About different parts of a world: spawn x - The x position where the player should spawn spawn y - The y position where the player should spawn world type - The world's theme. Can be "forest", "volcano", or "mushroom" row - A row in the world. These are organized downward. A row contains many characters. Here is a list of the characters and what they mean: 0 - Air 1 - Solid (with plants on top) 2 - Middle Water/Poison/Lava 3 - Trunk/Stalagmite/Mushroom Stem 4 - Solid 5 - Leaves/Stalactite/Mushroom Top 6 - Top Water/Poison/Lava