Yes you can ignore the signing of the app nonsense, newer Mac OS will demand you go to the system settings -> privacy & security and choose "allow apps from App Store and know developers" . when an unsigned app is loaded you go back to the privacy and security and select load app anyway and then say yes and put your password in.
older version of Mac OS all you had to do was right click load app or option click load app.
I think the itch app handles the code signing nonsense im not sure as I dont use it.