Needle in a haystack =D Voxlap
Download, run one of the bat files. Enjoy.
Puts the Geomod engine to shame.
Basically a Voxel is a method of creating 3D stuff, that predates polygons. It was meant to be the next big thing, but it never really took off.... But yeah, this thing is pretty cool.
I guess the 'aim' of the 'game' is to find the red upgrade thingy (Which then turns your gun into a cannon...)