You have to allow the scratch to record you, because you need to move yourself to move the guy. No keyboard instructions here! Move to the right to move 'Armless to the right, and move to the left to move 'Armless to the left! Move your hand over to the reset button to move 'Armless back to the centre.
I used the video scripts and the info I can get out of it. For a game using this see: http://scratch.mit.edu/projects/33441688/