You went to the effort of posting 2 HN comments, tweeting, and taking a screenshot because you are annoyed that this project used an open-source library and were transparent about doing so.
A ripoff of the visualization layer? Even if it was, who cares? That's not the work. What's next, you think a new chess engine is a ripoff because they use a standard chess board for visualization? A new protein prediction model is a ripoff because they use the standard visualization?
I took a screenshot in case they change it. Nullschool is 10 years old btw.