Hi! sorry about that, all I can say is "it works for me"! If you're getting a black screen, maybe a graphics card issue? This is a 3D game, with a semi-advanced lighting, so a very old GPU maybe wouldn't work.
You can try the downloadable version from the GGJ website: https://globalgamejam.org/2019/games/cat-house-cat (btw I just realized the link is broken in our itch page so I'm gonna fix it right now).