I figured it out and incase anyone else has the same error here's the solution:
The executable part of the app contained in the MacOS folder of the application isn't marked as executable. Open terminal and go to the folder which contains the game, then run chmod +x wohgame0909.app/Contents/MacOS/* and it'll mark it as executable properly and the game will run.
Can confirm that this work on .10
I ran from a new terminal, after copying the game into Applications:
cd /Applications
chmod +x wohgame.app/Contents/MacOS/wohgame
chmod +x wohgame.app/
open wohgame.app
Which threw the standard security warning but then I ctl-clicked -> Opened from the finder on the App and selected Open from the dialog.
Seems to work fine now
