[remram]

I suspect that it doesn't work on mobile? Otherwise I just can't figure out how to work it.

You might want to include a screenshot of a real-looking plan to give people an idea.

[spmvg]

Yes I didn't focus on mobile at all, and I notice it renders but drag-and-drop is broken, argh... I think I underestimated how many people would be checking this out on mobile.