I'll take a look into this soon, sorry for the trouble!
EDIT BY adamgryu:
> Since this thread is long, here's a link to the current workaround: https://itch.io/post/1516186
> I've also read that unzipping with the Unarchiver app will allow the executable to be run. (In addition to the two-finger click method)
> Sorry that these issues have to be worked around on Catalina for the moment!