The "Full-Body Action" version of Tornuffalo is available to try out. You need 3 Vive trackers to make it work: Clip one Vive tracker onto your belt on your back, and strap the other two tightly onto your feet using your shoelaces.
UPDATE: You can now try the beta with only 2 Vive Trackers, one on each foot... but it's sort of a hack, it wasn't really designed for just two trackers.
The body isn't perfect, but I think it's pretty good considering the limitations.
It's in a beta branch right now. After the game is installed, right-click on "Tornuffalo" in the games list in your Steam Library, then go to the "Betas" tab and choose "fullbody." I'm planning to soon make this version accessible through Steam's DLC system--free to owners of the game.
Body tracking is available now through the "Full-Body Action with Vive Trackers" DLC!
https://www.youtube.com/watch?v=VOBsfr5_npE
Also, I highly recommend playing it with the "Big Hammer" bonus mode if you're just getting started with the game.