I started the game on my MacBook, with a resolution of 1280x800, it worked.
Now I plugged in an external monitor, used as the primary monitor, and:
• the game fills only a smaller portion of the screen, I guess it’s 1280x800 instead of the full 1920x1080
• mouse clicks are totally unresponsive, but the cursor appears and the scroll wheel works. I just can’t click on anything
I tried setting a resolution via the “launch options” of steam, but it was ignored.
Here’s a screenshot: