Making mobile-responsive tables is a pretty involved thing, and would have been even more complicated by the fact that the table sorts. I think that most people will be able to scroll if they happen to check the backend on a phone or 90's era computer.
On the demo backend, if I click on "download csv" or "get code" I can't go back except if I unzoom (because the closing X is out of my browser window, and it's almost true in fullscreen too).
On the demo form the buttons "view backend" and "view code" are strangely placed. If I go fullscreen then the page tries to adapt itself and the grey box goes from wide to floating on the right, but the form is still to large to be on its right so it stays under it.
Also it's probably just a matter of taste but I find it weird to have such bigs field but that the text I can write in them is still of normal size.
There's still some kinks to be worked out particularly in smaller screen sizes so I just wanted to clarify what exactly you were looking at. Thank you for the feedback.