Usually, if you're coding in a game, you use images for the font (although that technically does depend how you develop it). Therefore, the fonts in image form isn't really a problem if you're using in a game.
If you simply want to put them on an image though, you'll probably have to copy/paste. If you want to write a lot of text (as opposed to just a title or sentence), you can try and put them into a proper font file, but you'd have to either do it manually or use a conversion program (neither of which I've personally done). Either way, any coloured fonts would probably lose their colour, as computer fonts don't have a set colour.
If you simply want to put them on an image though, you'll probably have to copy/paste. If you want to write a lot of text (as opposed to just a title or sentence), you can try and put them into a proper font file, but you'd have to either do it manually or use a conversion program (neither of which I've personally done). Either way, any coloured fonts would probably lose their colour, as computer fonts don't have a set colour.