I’m trying to play the game on the newest OS software and it’s not letting me even open the game file. Do I need to try on another system? 
Mac Catalina drops support for 32bit libraries rendering the game incompatible
So is there are way to still be able to play it on Mac Catalina?
Catalina and versions after it are not, and will not be, supported. MacOS dropping support for software architectures is not something that can be fixed. Either use an older version of MacOS, or switch to a different Operating System. Personally I’d recommend ElementaryOS.
How does Elementary work, and is there a way to like un-update my Mac so I can continue to play?
Please don’t necro posts, the last reply was a year ago