Kinect has already received its fair share of excited attention from developers, but Microsoft is still exploring its limits, too—and has managed to make it respond to mid-air, multitouch gestures.

Last year, Microsoft announced Joy Ride as a cash-op car game with avatar support for Xbox Live Arcade. Last week, Joy Ride re-emerged as a retail, Kinect powered, kart racing game. Kinect Joy Ride, ...