I have run into this problem with other games using some versions of Unity (especially Unity 2017) no matter where the game is installed. I have seen this also with games on Steam using some versions of Unity particularly when the Mac has an AMD graphics card.
The adult warning page comes up and can be clicked away. Then the start or new game page comes up and all of the buttons appear to work (the mouse over causes them to change). I click on new game and some dialog buttons appear, NEW GAME, FILE NAME, CONFIRM, CANCEL. I then type in a name for the game and hit confirm and nothing happens although the picture in the background is still scrolling/moving. No music at all.
UPDATE: I spent a little time going thru some of the unix files and found a couple of places where there are syntax errors noted. So if you use Unity 2017 plus some syntax errors, that may be the issue causing the game not to start up.