The landing page is quite noisy, what with the marquee text and the top and bottom text banners, etc. I would recommend simplifying things a bit and going with a cleaner look, right now it kinda reminds me of the style of websites in the early 2000s. Of course if that's what you were going for carry on lol. The actual editor itself is quite nice, good job!
Unconventional may be cool, but as it is now the page is not usable, not clear, and actually annoying. If you want to make a product out of it, it would be a good idea to rework it around some softer touches and more professional feel.
I have no idea how half the editor controls work (on Desktop).
How do you assign colors to a button? There's no 'accept' action in the color picker, 'X' closes it without assigning the color, and clicking on the color rectangle changes it randomly on mouse over, before you can apply it.
It could be nice to have a multilingual page option on the paid plan. All page creators I know are a drag (some more some less) and you can get language switches only with ugly workarounds.
This is great! I've been designing something similar (but different) recently. The interactions like dragging on the grid to add an element are genuinely brilliant.