A good try
Hit detection is HORRIBLE and needs work. You need to add about a dozen levels and bosses.
And to the guy who said it was too much work; stop yankin' it so much and get a girl. If she likes you, you can give your fingers a workout and maybe you'll have the dexterity to play. Good luck, virgin!
Anyway, a great try. Work on those two things, and you'll have a triple-A flash title.
And don't worry about people telling you some things are "wrong", (like turtle movement, for one,) because its YOUR game, and your style will have to ultimately rule over peoples nit-picking.
=)