I tried using it now and there are a few suggestions I have:
1) clicking "Let's do it" does nothing, if you are already on the "Build a website" page and the content is empty - it would be better if top <div> hid itself at least partially, or if bottom content animated itself into existance (replayed animation or sth. like that).
2) it would be nice to have an option to clean the page and start with new one (by the way, where do you save the data? I tried deleting everything I could think of and you still presented me the same page I entered... :) )
3) once the page is finished, I would like to share it with people from marketing - it would be nice if you offered a way to share the page through a randomized link
4) great work on emojis, though the selection is somewhat limited. You could probably reach a deal with flaticon.com to allow adding their icons. You could even get a referral fee for the subscriptions if someone wanted to get rid of the copyright statement.
5) selecting text with mouse doesn't work, which is a bit annoying (FF)
6) images are scrollable on lower resolutions instead of being downsized (is this on purpose?)
7) editing. I know, probably not doable, just saying...
But feel free to ignore any of the suggestions, I like the site the way it is too. :)
And while I can grab the files and set up my own hosting, being able to hit a button, enter card details and have everything done automatically would be powerful. Every web developer inevitably does quick jobs on the sides for friends and family, and making that process pain-free would be useful.