hiii so when it gives you the notif that talks about malware, click the question mark, the click "open privacy and security settings for me," and scroll to the bottom. under "security" it should show the game file you wanna open and then click "open anyway.' this is supposed to help you override Mac security setting so yu can open the game C:
awhh sorry to hear that, I also didn't read ur comment properly whoops!11! butttt if it helps you could try using terminal to open it. it worked for this other game I downloaded from itch so yaaa. https://terminalcheatsheet.com/guides/navigate-terminal
like just follow the instructions if its not too complicated and then close terminal and try running the game again. hope this helpssssss
try again but this time after overriding security move the game file (not the folder, just 'game') into your applications folder. i had an issue with elevator hitch where it wouldn't save my deaths until i did that ;v; i know it's not the same problem but it might still work. idk tho i've had a 2012 macOS catalina for two years