Kinect Doodle Defense
I just love this super creative game developed by Andy Wallace. Built in openFrameworks, Doodle Defense is a take on the classic tower defense styled game but "Kinectified" for that 2012 touch. The cool part about this design is that you can draw on a white board and have the enemies move according to your hand drawn layout.
The Kinect is used to capture the board image while a projector animates the "enemy" pieces. The idea is to prevent them from reaching the other end of the white board by using an assortment of different coloured markers.
For more on the project, head on over to the kickstarter.com project page