Now it’s time to test our level in action. Because we have no visible object in our level, make sure that PhysX debug mode is enabled. Otherwise, when you start your game, triggers won’t be visible and you scene will be black. Now go to Modify | General PhysX Options and make sure that Debug Mode is checked.
Go to File | Save menu, give your scene a name, and press OK button. Now press Publish button to start publishing your game (alternatively, you can go to File | Project | Publish… menu. This will bring a new dialog which lets you publish your game.