It will ask you to use your webcam click yes then wait until you can vaguely see your shadow in the background then punch at the screen
Wow i cant believe how popular this has gotten i only made this as a temporary substitute for a game on my website because i was removing it and i was going to delete this a replace it with a good game but looks like i cant now can i!! Punchbag from this project http://scratch.mit.edu/projects/16714678/
