How come the font is 8x8 pixels instead of 10x10?
The OHRRPGCE font is 8x8 for historical reasons. The font-drawing code was originally written for the game Bob the Hamster VGA, which uses 16x16 maptiles and sprite tiles.
Work is well under way to retrofit the code to support other fonts sizes. The main problem is updating all the built-in menus which assume fixed 8x8 fonts and screen layouts.