At $3.95 I decided to try it myself on the PC. \:\) Using a wired 360 controller, it's pretty much exactly the same as the Xbox 360 version, albeit not as impressive on this monitor as on my big TV. I'd say it's certainly worth buying, although maybe another control scheme wouldn't be as intuitive.

I bought it through MSN Games, though, as it said to download there for the Vista version. I guess the version on Steam is the XP version.