The game runs great, but getting it to run in the first place was difficult. What I had to learn, other than the black windows and launcher window issues mentioned above, was:

1. You need to modify the launch options, otherwise the installer will complain that you don't have enough space to install the game.
2. You need a new Proton version to actually start the game. (I could start the launcher but nothing would happen when I pressed Play. Then I discovered I was accidentally using an old Proton version.)