Yes, manually install by either git cloning into the menu directory, or git > download zip > extract into the menu directory. You'll need to delete boxmenu otherwise both menus will try to render at the same time. I imagine it will only work with version 2 of the framework outside of the Authoring Tool.
As a side note and for a bit of community history:
*inhale*
Most of the extensions in the cgkineo repository are currently unavailable to the wider world. Kineo diverged somewhat from Adapt Learning when the framework had some major issues which blocked their development and when the Authoring Tool wasn't ready to code against.
Kineo have now gone into reverse as the community has become heavily invested in producing a solid Authoring Tool and are far more receptive to ongoing change. Kineo is now investing a lot of time into the Authoring Tool and a lot into pushing the framework forwards. Many of Kineo's plugins which do not currently work with the Authoring Tool or are not searchable on the public bower library have much time and effort invested in them and so will be brought inline with both aspects of Adapt, leading up to and beyond the coming release of the Authoring Tool and framework.
*and relax*
That being said, feel free to hack, chop change and play with the cover-menu, but be aware that it's not formally ready for use.