rd-132211 (20h 11min, may 13, 2009 y – 21h 28min, may 13, 2009 y)
Description:
 Placing and destroying blocks.
    Left-clicking places a block. Right-clicking 
    destroys a block.
Blocks cannot be placed past the existing border.
Falling off the edge or digging through the bottom of the world will not kill the player.
Blocks
    Block types are handled depending upon 
    where they are located within the world, as 
    opposed to later versions where any block 
    can be placed anywhere. Blocks at the same 
    level as grass turn to grass and blocks at the 
    same level as cobblestone or air turn to 
    cobblestone.
World Generation
    Level generation improved to be not so 
    messy and random (as shown in the Cave 
    game tech test video), but instead completely 
    flat. 
Added to timeline:
Date:
20h 11min, may 13, 2009 y
21h 28min, may 13, 2009 y
 ~ 77 min