Texti is yours? It looks like an interesting experiment. Lots of good ideas in it, though it gets way too unfocused/wip in the second half of the document, especially in some areas like the "blocks". (Also your emojis are broken)

Having hash line comments is probably a non-starter in a text format (the latex % syntax is probably a better idea indeed if you want line comments). Also the -- strikethrough -- syntax will probably conflict too much. You want comments to use a syntax which is otherwise nearly unused.