The project folder is for creating other builds/modifying/learning/etc. You can put either the Linux build or the project folder in the Ren'py SDK project file path to play the game as well.
https://www.renpy.org/latest.html
I did not make a windows build. Since this is a non-profit, free and open-source project. I can't be wasting time on other builds. Most of the Windows users have been toxic and acting entitled for me to not make a build for Windows. I need to move on from these projects.
If you want to try Linux, I recommend Linux Mint [ https://www.linuxmint.com/download.php ]