You are probably being restricted by Mac's Gatekeeper security. You need a console command (below) to undo its restriction which you can find in the System Settings Security tab.
sudo spctl --master-disable (will remove all Gatekeeper restrictions)
For some reason that isn't working. I put the code in the terminal but whenever I try to open it it says it can't open the application. I'm used to having to go into the security tab to force open games from this site but I don't have that option with this one
