No text, but a visual code

[ReneZ]

Let me put up a counter-argument, just for the sake of the argument.

Why did the author choose to use rows of c-shapes:  [c]   [cc]   [ccc]
but not their mirror image?

One possible reason is that [c] appears in Western alphabets, but the mirror image does not.

Now it does not even matter whether I believe this or not, but I would say that it is a reasonable argument.