Rigid body constraint demo(a roughly walking sort of ant)

Hi everybody,
since a long time now, I’ve been lurking the game engine sections of the blenderartists forum and I noticed there is not a lot of rigid body constraint demos. So I made one. I hope you’ll enjoy it. I must warn you, I’m not good at modeling and texturing. As a matter of fact, there is no texture at all. Another warning, it’s a work in progress.
Here is the link:

edit: I use UPBGEv0.2.5b
edit again: I was thinking I should post a screenshot so here it is