Pretty good
It did have the information that is needed, but it was in chunks far too big. You should have split the information up, and included screenshots and/or movie clips of what you are supposed to do. Also, explaining the ActionScript you are giving out is a vital part of making a good tutorial. They arent going to learn anything if you don't explain what the codes they are using actually do. I must also point out that there are different styles of colouring, than radial gradients. It was kinda samey. The mouse cursor should be on top of everything, not below some of the buttons. Also, you need to go over the music selection, it just overlaps itself when you try to switch songs. Overall I would say its a good tutorial, but it needs work.