[aufreak3]

Thanks for the link to draftin. Looks very useful. Fwiw, the op's work seems equivalent to draftin's "Hemingway mode" .. which (if I understand it right) doesn't permit any edits at all.

[Wistar]

Ah. Is this why the both the delete and backspace key appear to be disable in earnest?

[xerophtye]

Yes, they mention it on their landing page that the purposely disabled those to make you focus on just putting words on paper. They don't want you breaking your flow to correct a typo