itch.io

This should solve it:

Try authorizing it in Settings -> Privacy & Security.

If that doesn't work, you can try openning a terminal (command + space, type in terminal, hit enter), then run:

chmod +x PATH TO APP.app/Contents/MacOS/LustsCupid.app

Once you've done that, you can try again to do the usual Settings -> Privacy & Security.

try this on mac: have the path to the application. type 

sudo chmod +x PATH TO APP.app/Contents/MacOS/APPLICATION NAME.app

If your Mac uses apple silicon chips, do not bother. The games graphics do not work on apple silicon chips like the apple M1. This should work on macs that use intel chips. 

I'm pretty sure it's a unity thing but idk

Edit: added screenshots