I used the great face recognition code Marilena. This awesome bit of AS3 code is based on some older work done in C: OpenCV. Once I knew where the face was I added a little bit of physics. Using 2d ball on ball collision I can make the ball bounce of your head in the right way. To see how these collisions work check this page.

Have fun playing the game. And for the non-Dutch speaking visitors just click ‘webcam’ to play with your webcam (duh) and ‘muis’ to play with your mouse. Play the theFactor.e Keepy Uppy game here.