Could be better
Since I played many games very similar to this, I'm afraid yours doesn't offer anything new or exiting.
If you did only spend about an hour on it then well done, it's not bad, but improve the graphics, and make a nice title screen. At least then it will be in the same leuge as other similar games.
Sound quality didn't seem too good either.
Overall - 5. Admitidly, I wouldn't even know where to begin with flash, so you've done better than me :) However, if you spent more time on your work and imprved it a little I think it could be really good.