Concept:
The minimap could display lines that contain class/method names as readable text in a tiny font, so that the user could navigate between classes/methods using the minimap.
Rough mockup:
Here’s a rough idea of what it could look like:
(I just used figlet to generate ASCII-art fonts, and pasted it in the source code. It could look a lot better if a good pixel-art font was used, and the colours were more saturated.)