If there's a common barrier to playing with a Kinect controller, it's free space. The sheer amount of necessary distance between sensor and player is fine for suburbanites with expansive living rooms, but not so hot for apartment dwellers. Thankfully, BitGym is doing its best to bring hands-free gaming to small spaces with a new Motion SDK for Android and iOS developers. The kit takes advantage of the front cameras on phones and tablets to track three-axis movement, leans and multiple players without any special hardware -- and without necessarily rearranging the furniture. It's built to work with Unity 3D and most common app code on both platforms, all with a reportedly low overhead for mobile processors. Just don't anticipate any leaps and sidesteps in your loft for the next little while. Although the SDK is ready today, we won't see shipping games built on the motion-friendly framework until early 2013.