Unfortunately the Security & Privacy isn't listing the app at all, it isn't like it is prompting that it needs access for accessiblity/screen/disk like other apps do. Here are the relevant lines from the system console when trying to launch the game. Here is the error screen.
default 11:10:43.659831+1000 lsd Non-fatal error enumerating at <private>, continuing: Error Domain=NSCocoaErrorDomain Code=260 "The file “PlugIns” couldn’t be opened because there is no such file." UserInfo={NSURL=PlugIns/ -- file:///Applications/TheWorldBeginsWithYou_v1.0.2_MAC.app/Contents/, NSFilePath=/Applications/TheWorldBeginsWithYou_v1.0.2_MAC.app/Contents/PlugIns, NSUnderlyingError=0x7fec6311dae0 {Error Domain=NSPOSIXErrorDomain Code=2 "No such file or directory"}}
default 11:10:43.659877+1000 lsd - 45683955: Checking whether application is managed at file:///Applications/TheWorldBeginsWithYou_v1.0.2_MAC.app/unity.Fabian Denter. The World Begins With You
default 11:10:43.678561+1000 Finder LAUNCHING:0x0-0x243243 TheWorldBeginsWithYou_v1.0.2_MAC foreground=1 bringForward=1 seed=545 userActivityCount=0
default 11:10:43.683779+1000 Finder spawn_via_launchd() failed, errno=111 label=[0x0-0x243243].unity.Fabian Denter. The World Begins With You path=/Applications/TheWorldBeginsWithYou_v1.0.2_MAC.app/Contents/MacOS/TheWorldBeginsWithYou_v1.0.2_MAC flags=1
If I `chmod +x /Applications/TheWorldBeginsWithYou_v1.0.2_MAC.app/Contents/MacOS/TheWorldBeginsWithYou_v1.0.2_MAC` and then `./Applications/TheWorldBeginsWithYou_v1.0.2_MAC.app/Contents/MacOS/TheWorldBeginsWithYou_v1.0.2_MAC` at a terminal window I get this screen:
I should be able to double click on the icon rather than having to resort to terminal shenanigans to make it work.