hi! i just downloaded on mac and had the same issue. the work around is two finger click on the game, then hit open at the top. A window will pop up with the open button. After you’ve done this once you never need to again :)
I did the right click open but it's still giving me the same pop-up with "Done" and "Move to Trash".Edit: Ok I needed to open Privacy & Security and from there click "Open Anyway".
