KnightForged Studios is currently in the works on a demo for their upcoming game Cube27.
This demo will be a pre-alpha demo and will feature 3 predefined puzzles and the option to play a randomized cube puzzle. Since the demo will be pre-alpha players should expect some bugs and the appearance is still being polished.
The purpose of this demo is to allow fans to try out the game and hopefully bolster support on their Kickstarter site. If you want to help out with their Kickstarter you can visit their page here.
The demo's release date has yet to be announced, but it will be very "soon".