The editor and generation scheme is really cool.

I'd like more info on the possible "operations" that form the font glyph though. First I thought it was all just choosing dots on the 3x5 grid and connecting them with lines, but there also seem to be "half-strokes" (lowercase i) and "rounded corners" that don't align with the dots (used for almost all "round" letters like O, C etc). Especially the latter seem to be crucial if you don't want all the round segment to look like diamonds.

So how do I do those things in the editor and are there even more of them?

Edit: Or is it really just 5x9 instead of 3x5 with only every second grid point visible? Lowercase "f" looks like that.

Also, it's kind of obvious you can't draw a "#" sign on a 3x5 grid...