The builder works very well once you realize what you're supposed to do. After designing the first block, I didn't realize I had to keep going. Maybe a more apparent CTA would be appropriate?

I'm curious, will you be adding a hosting option for these? Right now they provide a good starting point, but I would love a one-click hosting option so that I can quickly made a page and push it live. The ability to plug in things like Google Analytics token would also be awesome.