In your case, my suggestion is the same:
You can try to download 'Windows_NoFullscreen_version.zip' from the download section now. Maybe this one will work.
Also, I have found forums where people discuss how to fix the black screen issue with Unity-based games, maybe this will help:
https://forum.unity.com/threads/black-screen-in-unity-games-games-i-play-not-gam...
https://steamcommunity.com/discussions/forum/1/1480982971174752598/