Just click on the squares to toggle the music on and off. You may have to click them a couple times for it to turn on, and it will probably take a second to stop the music when you are turning it off. I hope to add some updates to make it run more smoothly. ! Just tested it and doesn't work on project page, so you might have to press "See inside"
This is my own TINY version of the button bass cubes. You can check them out with this link, but it does require flash which you have if you are using scratch: http://www.buttonbass.com/dubstepballs.html You can leave name ideas for my project in the comments, yours might be used.