hmm, not to sound rude man, but Psyfira is absolutely right. You development process seems to be really "underdeveloped". It really looks like you haven't sat down and planned what you are doing, eg. Story, Original Code, Characters, Enemy, Target Audience etc. those are just really simple ones of the top of my head.
Also you said you haven't seen any good Platformer games in Flash. I really don't think you have researched you medium well enough my friend. Even browsing Newgrounds would prove you wrong.
Now don't get me wrong, i think its great that your doing this project, but to be really honest, Psyfira was being 'nice' and truthful, but i'll be a little harsher to get the point across. You are thinking way ahead of yourself, if like you say, your game 'engine' is near completion then your have some serious considerations to make. From mostly everyone's point of view besides yours, this game is generic, underdeveloped, confusing, buggy, and looks like it was made over a weeks time. Now i understand you are learning still and thats fine, but you are approaching this project as if someone is going to actually buy it and people are going to talk about it in your newspaper. Tell me how your would possibly publicize it and get people to notice it. This is just one of the things you are lacking, marketing.
Basically what i am seeing is; a tweaked existing code (which you have still failed to site), with popular generic graphics, pointless gameplay and poorly executed.
Im saying this to you now because thats what i see, i'm not going to be your mom and say you did a good job, i'd rather you hear it from an random then getting blasted by someone when you try to pitch it to them to publish it, or even as folio work.
I've looked at your todo list ands it seems to be missing things like UI, heath bars, alternate enemy sizes and stats, a concept etc.
Even little things that when looking at your project it shows you haven't really sat down and planned. You are just winging it, which is why not many people are taking your game seriosuly.
Good luck, none the less, but as Psyfira said you are still learning, don't expect this game to sell or even have custom sprites made for it. First finish your concept developing stages before you even bother with coding an engine. If you want some help with indy developing, maybe you should talk to GBAtemp's member TakaM., he is currently in the process of making a 2D platformer game based on Twinsen (from an old PC title Little Big Adventure).
http://takam.wordpress.com/downloads/
He might be willing to give you a few pointers. ("might")