Potential = you
Your graphics were good. work on animation, as this had none (note, I'm not counting motion tweens of speed lines or tint). You have the potential to make a great flash and I'm sure that this took you a little while to do. but try to work on the animation part.
btw, I don't think your preloader worked. just look for a tutorial on the web on how to make them. they are just copy and paste nowadays.