From the current project I extracted the menu in a Prefab. It’s still very basic an can easily be customized.
Only Unity UI Stuff + 1 MenuManagerScript
More Details can be found in the Script inside the package.
The Tutorial I (partly) followed is…
The recap of the most important things to do is here (Around 5:00 min)
Download the unitypackage:
ReusableMenuLeftSide