It's now ready to roll. Don't worry about the size of the window. I know we made the movie 850 pixels wide, but that is just for layout purposes. You can just scale it down when you insert it in a web page.
A few cool modifications might be nice. How about animating the buttons? Or maybe reverse the x and y roles to make the menu appear vertically, instead of horizontally.
Just some things to keep in mind when playing with this. First of all, remember that because of the zoom feature the menu will require more room on its left and right sides. More icons can fit on the menu bar by reducing the size of them, but this will eventually make them too small to see, even with zoom. Be careful of overlapping icons during the zoom. I found that 36 pixels wide is about the widest you want to go with the way this is set up. By spacing the icons out farther you can get fatter ones in there, but try to keep it consistant for a clean look.