https://civboot.github.io/lua/asciigame.html
Note: right now the editor crashes if you mis-type any of the syntax... it's not really fully launched, going to fix that soon hopefully but you can see a [screenshot](https://civboot.github.io/img/asciigame.png) of what it looks like
Also, if you know any other good references for getting into asciiart I'd love to reference them as well.
Note: the Ele editor isn't _quite_ ready for all the asciiart features in your blog post, notably virtualedit and macros are not implemented yet - but I just added basic visual mode so it's getting close!
/x/e-3
/x/+1
/x/;/yz
...it allows near arbitrary cursor placement (eg: this blog articles "squiggle" situation) to be able to find the beginning of the squiggle, or the end of the squiggle (or temporarily using "X" and "Z" for start/end, and "clearing" it with `V...:s/[XY]/./g`