I can second this claim! I don't really know how it works, but using Unarchiver to extract the zip file seems to be a more easier solution to the problem than the one with the Terminal. This also worked with one other game that initially wouldn't open on Mac Catalina for me. Also, if anyone needs more help or steps with this method, I can make a new comment explaining the whole process over.
Ah, here's the new comment explaining the whole process in case you didn't see it yet!