NOTE: This requires a working webcam. Click on the green flag to start. Answer the question for which sprite you'd like to use. One is a Ball, the other is the Scratch Cat. A 3,2,1 countdown will begin to let you get into position. Move away from the camera until your head is around the size of the chosen sprite. When the countdown ends, the sprite should follow your movements! Move your whole body for best results.
I used ideas from a few other Scratchers and looked at their code for inspiration on how I would let the camera interact. However, I did not use anyone else's code. Please comment with ideas, bugs, etc. I hope it is fun!