Minecraft 4k

Minecraft 4k was an edition of Minecraft developed for the Java 4K contest.

The initial version, released on December 2nd, 2009, was more limited than any other edition of Minecraft ever released to the public, including the pre-classic version that is available from the Java Edition launcher. An update on December 4th changed the controls and added widescreen, more blocks, and the ability to place and destroy blocks.

The web page hosting the game was removed in November 2014. It can still be accessed using the Wayback Machine, but the applet does not load. A third-party download exists and can be downloaded here.

General
Players can place and destroy blocks. The only block the player can place is grass, reminiscent of the very early builds of Minecraft internally called RubyDung that are available from the Minecraft launcher. Leaves do not decay.

World
The same 64×64×64 block world is generated every time the game is loaded. The only blocks in the game - air, grass block, dirt, stone, bricks, wood, and leaves - are scattered throughout the world. No mobs exist.

An invisible wall surrounds the world, preventing the player from escaping, similar to invisible bedrock.

Controls
The player can move around using standard controls, as well as jump using.

Left- and right-clicking controls are reversed from traditional Minecraft controls; left-click places blocks and right-click destroys them. Middle-click also places blocks. Moving the mouse will turn the camera "smoothly", similarly to pressing in Java Edition, and cannot be changed. Pressing toggles the player's ability to move.

The game lacks any sort of options menu.

Graphics
Graphics appear pixelated as a result of the game rendering at a low resolution. The sky is black due to the lack of a skybox.

The textures of blocks are similar to those used in Classic, as 0.30 was the most recent release of Java Edition at the time.

Technical aspects
There are a total of 16 block IDs in the game. However, not all of them are used by unique blocks. The remaining, unused block IDs are simply dirt blocks.