My browser can open the SVG two coloured image OK, but other vector applications fail.
FontCreator 13 can open it, but makes no sense of it.
FontCreator can make multiple coloured glyphs quite easily, but not all applications support coloured fonts yet. Each shape is coloured separately, and the layers are combined to make a single coloured glyph. If you have any application that can edit SVG images, such as Inkscape, try copy/paste from there to a FontCreator Glyph edit window.