Now version for 20.04 at the moment gtk and metacity only, icewm and cinnamon will follow. Please comment! Then screenshots will be updated, optically its still the same theme .
Roughly based on adwaita 3.24.
It does in fact provide a traditional user experience and show interesting code based hacks to get a workable codebase where other themes can be build off easily.
A cinnamon theme was included in the 18.04 variant. However it maight be outdated.