From what i've seen, it looks like we could definitely make something that would interest people in to using construct here. I can help, I'm a relatively experienced construct programmer.
Looks like this could turn into a nice final fantasy style RPG. I LOVE the bright graphic style.
I don't think we need to make a demo though... Why not just make a full game? Construct needs a full game to really get the interest rolling.
I'm keen, lets get more info going...
EDIT - I also have contacts in the web hosting business, so file hosting won't be an issue.