Heya,
HOKORI SAMA contacted me, and yah it is definitely possible to fix the half width issue but to do it properly will take me some time as I never worked on this engine before.
View attachment 3523398
This is what a few hours of work got me (literally just reducing the space between the letters to 50%). The game font works well enough as monospace so we could consider that in the worst case. But I'll work on measuring each char for the font and displaying with the correct keming.
After that comes implementing line-wrap and maybe a custom font?