My take on Gravity Blocks Demo .. cool. Playing with Gravity and Blocks in a huge VR room. You can almost feel them as they come near. Great little demo. It would be good to have the gravity controlled with something other than the keyboard. mm .. real potential for something like this to be controller with voice .. who knows what kind of puzzles or gameplay can come from this. Please keep us updated on your demo here. I'll be posting more on http://virtualreality.com.au/2013/08/11/demo-gravity-blocks-demo/