Earlier quoted context omitted.
I offered a very bird's eye view of what a newbie understood from the language, not a "unique selling point" because, like I keep failing to make you see, Blow is not trying to "sell it" to anyone.
See e.g. https://www.merriam-webster.com/dictionary/selling%20point > Blow is not trying to "sell it" to anyone. For that, he is doing a lot of promotion for his new language with all the youtube sessions and blog posts about it.
If it's promotion for anything I think it's rather for his sokoban like game.