I've been trying a similar approach. I developed an Electron app called First Novel App which is supposed to help writers silence their inner editors.

It's available free to download at http://www.firstnovelapp.com which redirects to a Gumroad store.

That's a really interesting concept - the snippets idea reminds me of The Road by Cormac McCarthy. No chapters in that book, only paragraphs

Thanks! I'm also working on a web app version of it.