It's cute idea but, feels distracting. Maybe a nicer color scheme would work better.
I'm even doing some html-css-js-m4 work for a relatives business website nowadays, and I did not miss highlighting even with such complex mess, instead, I'm happier.
Larger blocks of cited text might work.
I can't help to think that this was done by someone that does not read that much.
Younger people seems to prefer videos instead of READMEs, and I have not really understood why until I saw somewhere that speedreading skills apparently have been falling drastically among young people. I mean why look at a video for 30 minutes to see if a tool or framework is worth trying, when you can scan the equivalent text in 30 seconds.