It's weird that markdown blogging isn't really a thing right now.
Edit: Aaaand, a crash in the editor a few seconds in.
After switching my blog from Wordpress to Octopress, I've run into a lot of stylistic problems that Markdown can't handle intuitively. (such as alignment and image links)
The website is pretty horrible, as others have mentioned. The imagery is completely irrelevant, and links just seem to go to random, unrelated pages. 12 days ago your site says you intend to treat this as a serious product... and now this?
The editor itself does look pretty interesting, although I haven't had the time to directly play with it. My recommendation would be to focus on just that, figure out what it I'd you actually want it to do, and then go kick starter, open source with donations, or some form of hosted editor service or premium license.
Good luck!
The demo felt pretty much same as github pages
It looks really cool, but as others mentioned the copy needs work.