The Lierean Alphabet

It is like also what I thought of before that I thought the symbol for the sounds should be based on the combination of their properties (like they do in there), rather than making them alphabets of other languages (like done with IPA) which do not have shapes with these properties.

Is there some reason why capital & lowercase versions of some of the letters are so different? If it's meant to resemble Arabic that might suggest they are different sounds,not just a lowercase or capital versions. I don't see why different characters makes sense at all. This seems to be a featural alphabet, but not being a linguist the "front/mid/back" stuff is nonsense to me too.