Minecraft 4k

Minecraft 4k is a version of Minecraft which takes up only 4 kilobytes. The version of the game has a lot of it left out - you can only place or destroy blocks, you can only place grass blocks, there are only grass, dirt, stone, wood, leaves, and brick blocks in the game, there is no sky but just plain blackness, and the map itself is very small. The game also appears to be like Classic - it takes no time to destroy blocks, you can place an infinite number of blocks, there is only a small number of blocks, there is no day/night cycle, there are no mobs, and the map itself is finite. Moving the mouse will turn the screen "smoothly", like pressing F8 in Beta, and there is no way to disable this. The placing/destroying-blocks-controls are switched around, making the left mouse button place blocks, and the right mouse button destroy blocks. There doesn't seem to be a way to edit the controls, or even access a menu. The game is playable, and free on the link inside the tweet. See references.

Trivia
The Void does not exist in Minecraft 4k. Instead, if you hit the bottom black layer, you will be unable to move.