Gameplay Features:

Added moveable "down" which allows the player to select from which direction gaps will be filled after a match

Tech:

Mostly under the hood changes, added support for 32*32*32 hypothetical limit, but time might end before the game starts as the probability of a match is much greater than 1 for anything much larger than 3*3*3.

Improved match checking for cubes greater than 3*3*3, (though it will be deprecated in version 2.3 in which cubes of greater than 3*3*3 will be available.)

Art:

Changed "gem" appearance to plain colors and simple shapes

Changed skybox/background to a picture of a piece of graph paper

Audio:

Added sounds