Private methods in a module, and modules in BangleApps

Could you give me an example of what's not working that you expect?

I just tried and this works...

var d = require("https://raw.githubusercontent.com/OmegaVoid/EspruinoDocs/master/modules/dane_arwes.js");
var x = d.create(1,2,3);
print(x.C);
/*{
  color: {
    primary: {...*/

But one thing I can see is you've got:

function drawTopLeftCorner(x, y) {
  g.setColor(this.C.color.primary.base);

But drawTopLeftCorner isn't a method - it's just a bare function. So in that case, this won't point to the object and you won't find C...