Fun/Impressing 'Pit stop game'

Found this fun drag’n drop game. Thinking about maiking my own drag’n drop game. It cant be to complicated, right? Do you know a good tutorial that would help me out?

Drag’n drop game:
http://www.batterydrink.com/pitlanegame/
(You will never beat my record…! 15:38)

So far I’ve done this:
www.photat.com/drag_n_drop_multiple.swf