gbdk font - quinkennedy/bitbitJAM3 GitHub Wiki

Basically each letter is 8x8. The font library renders fonts onto the background to avoid the 10 sprites-per-line maximum. You can have a black/white font, which takes up less ROM memory, or a 4-color grayscale font. There is no set characters or order you need to provide the tiles in, but it is recommended that you place the 'space' character first.