Here are a couple of sample videos that show the results of face tracking with the Xbox Kinect 360 camera.

In the sample below, you can see for one second where the camera looses track of my face, then it quickly updates again when it regains tracking.

At the time I started planning this project, there were a few different pinball emulators to choose from. Future Pinball, Virtual Pinball 9 and Virtual Pinball 10. These are different public / open source (not sure) pinball emulators / creators. They can be used to create you’re own tables or play tables / recreations created by other users. You can find plenty of resources here to get you started building your own virtual pinball cabinet : https://www.vpforums.org/