Hallo everyone, Mac users!
It took me a while, but I should have (kind of) fixed the code signing issue that was preventing my game from working on the latest versions of macOS. 

In order to play my game:
- download the executable;
- move it into the Application folder as requested (or any other folder other than the Download folder);
- right click to open;
- confirm "Open".

That's it! :)