OVNI is an interactive game where the player needs to throw (real) projectiles on the wall to hit objects in the game. This games requires a Kinect 2.0, a wall projector, small projectiles (ball pits) and of course a computer.
Here's a screen shot of a player throwing a ball on the projection on the wall :
The image below explains the setup :
*the Kinect height needs to be approximately 10cm over the elbow height of the player. *the only moving thing that the kinect should see is the ball