well done, i can see you spent a lot of time on it
...but I'm saying this hoping that you made this from scratch. I know that http://www.flashkit.com has a tutorial for a space game engine that you can simply download. I've seen that game submitted to newgrounds hundreds of times and it follows a very similar gameplay as yours does. If you actually did script/design/program this game then you deserve a 5 for sure. If not, it's still nice effort but come on, use some originality.
JP
P.S.
If you actually made this from scratch and you're interested in partnering with me to make a complete amazing car game, email me at jp_vancity@hotmail.com I've already finished most of the script and graphics but could use some help from someone talented. Thanks.