Good, so then you will have a good starting point for to look and get familiar with.
But please remember, this test project does use a meanwhile older local copy (within the sub-directory) of some few metadarkstyle files. Having some modifications in it.
At the end you surely want to use the files as installed from the package.
For that you should, finally, remove the subdir from the path parameter of the project settings.
Hopefully that works the same way.