I got this working on macos when it says "The application cannot be opened"
Extract the game to "Downloads/Mac" (this is where mine went by default) and run
"chmod +x ~/Downloads/Mac/CoffeeTalk.app/Contents/MacOS/CoffeeTalk"
in terminal without quotes
right click -> open is still needed at first
If you moved the game to the Applications folder you can run
"chmod +x /Applications/CoffeeTalk.app/Contents/MacOS/CoffeeTalk"