Not sure if it's an issue on my behalf but when trying to open the application on mac it says "You do not have permission to open this application on CoffeeTalk". I've never had this issue opening any other mac games on itch so if anyone has any idea ^^ :)
When you're about to open the game:
Right-click (or ctrl-click) and select "Open"
It might present the "This application can't be opened."
If it does, then repeat the above instruction and the second time should present an option to allow you to "Open" the app anyway. It wont ask you again after that.
If that doesn't work, then the devs will need to apply a fix 🤷 Hope this helps.