this is my way for playing angry birds :D/
cheers...
i used convex hull and convexity defect code from luca del tongo's blog with skin detector in YCrCb color format. And i used pyramidal lucas-kanade to detect the optical flow in the image for each frame.
You can check the code in my github account : https://github.com/situkangsayur/MouseHandTrackingLK
**don't forget to click star in the repo :D
http://situkangsayur.wordpress.com/