@RubenVerg I suggest:
1. Moving the GitHub link to be superscript (and/or right-justified) on the h1 title line.
2. Combining the lede and the bullet points into a single paragraph:
This tool allows you to compare the 320 glyph meanings of all (?) APL dialects, making it the ultimate language toolbar. Many dialects call the same primitive different names. In this list they are all grouped under a common name.
3. Make the two bulleted lists below the rainbow be inline lists:
x, y, u, v: Arrays m, n: Monadic functions d, e: Dyadic…