One of the more interesting things is that the demos were almost entirely just the demo form a marching cubes package they bought on the Unity Asset store for $100 [1]. Even down to the textures. The only additional feature were the two rigged characters and a those few building meshes.

The creator of that package, formerly an enthusiastic developer of a cool product, pulled his product from the asset store when yogcast's kickstarter hit half a million and apparently abandoned game development entirely.

[1] http://forum.unity3d.com/threads/introducing-voxelform-voxel...