Absolutely awesome! I'm impressed by the level of polish, this is waay beyond the usual POCs you see for hacks like this.
For me, the tl;dr from the technical explanation was this:
> Now, everything in fontemon is baked
Just reading that made me laugh out loud. It's so simple and so ridiculous, i love it.
I recommend reading the entire blog post btw, it's very thoroughly explained and it assumes no knowledge of either fonts or gamedev.