Java Edition 12w16a

12w16a is the second snapshot released for 1.3.1.

Additions

 * Demo mode
 * Added a demo mode for non-premium users (won’t be available until the full update)
 * In the language files, new text was added for the demo mode
 * The demo mode will last for 6 in-game days (about 1 hour and 40 minutes) according to the language files
 * It also teaches the player how to use the controls and how to begin playing
 * Bonus chest
 * Added bonus chest option to create world screen
 * When enabled, starts the user off with a chest surrounded by torches nearby containing tools, items, and blocks helpful to starting a survival game, bonus chests may contain:
 * Wood
 * Wood planks
 * Sticks
 * Stone and/or wooden pickaxe
 * Stone and/or wooden axe
 * Bread
 * Apples
 * Commands
 * Added option to enable single-player commands to create world screen
 * Added several new commands:, , , , ,
 * Typing  then pressing  will show a list of available commands
 * These commands are enabled in previously generated creative mode-worlds
 * While using commands, the world around the player is frozen, unlike in multiplayer

Changes

 * Language files
 * Updated language files
 * Controls
 * Items can now be deleted from the hotbar by shift-clicking while on the Creative mode item selection screen