This is really fun.

Surprised it doesn't come with instructions about which letters map onto left/right start/middle/end.

Also, the choice of those mappings is not very intuitive. A simple idea might have been a-g starts, h-t middles, u-z ends, for instance.

On a little side track -- why is the word typeface (often and here as well) used when there is a shorter, more known word available?

PS I really like this very creative font!