how can i play it?
Relive the first few hours of the PS4 classic, rebuilt with PS1 aesthetics! · By
Are you serious? Just download the zip file, extract it anywhere on your compter, then run the .exe file
If you would like to use a controller, add the game to steam, start big picture mode, go to general settings of big picture mode and activate support for whatever controller you may be using, in my case it was a PS4 controller, after that just start the game in big picture mode and you can use your controller.