Okay, let me begin with this…
I love this kind of stuff, but can never seem to adapt it (them) to my way of working. There is an implicit assumption being made that the display, end to end (I’m mostly taking about the X-axis here) is the entirety of the TiddlyWiki story river display, in a conventional 1-screen environment. Understandable, that’s how most users use it, out of the box.
On my setup, my TiddlyWikis occupy 3, sometimes 4, 1920x1080 screens. This usually means I have a ton of work ahead of me to even get started using stuff like this. In actuality, I back out, which is a shame.
So, here’s your demo, the river occupying the entirety of 3 screens:
Here’s my wiki, spread across 4 screens, the river only occupying one screen (far right):
Which leaves me with one question: can you see a way to add a notional “river-width” setting to tame its landgrabbing nature?