I just grabbed the demo on Steam, but I have this graphic glitch. As you can see it's like a lot of the textures are missing. When on the character select screen, they're like ghost bodies, and in the actual game I can dont have the floor showing, or my character except their hair.
Win 7 64x Home
ATI Radeon HD 5800 (I have the latest driver)
Intel i5 760 @ 2.80GHz
8G Ram