I think they are really good design. The stick out like a sore thumb (reading > writing) so you immediately know "this does something a little special and isn't typically called directly". Contrast that with some languages that just use up perfectly good names in the namespace for operators. Unless you know they are special you are left wondering.
I thought you were nitpicking but looking at that sample code... "endc_function"... wow.
From what I can tell it probably doesn't have significant whitespace.
Unhinged. Read the README - the project goals have absolutely nothing to do with what you're talking about. You "have" to actually understand that, not be unhinged for no reason...
That's a quick jump from "in my opinion" to "you have no clue about".
I mean, the author is probably not a programming language design specialist, but I feel that's overly harsh - they hopefully learned a bit when working on this toy project.