Setting the Main Camera's Viewport Rect height to 0.85 means that the gameplay will only be rendered for 85% of the screen, leaving the top 15% unchanged by the camera.
We had to delete the AudioListener components in our extra two cameras. This is because, for the Unity 3D sound system to work effectively, there should only be one listener in a scene (at one location). This is so that the reproduction of the distance from and angle to the listener can be simulated.
By setting our UI Canvas' Render Mode to Screen Space - Camera and its Render Camera to Camera 2 - timer, our UI Text is automatically centered in the camera's view, and so, our timing text appears clearly displayed in the top 15% of the screen. The GameTime.cs C# script class gets a reference to the UI Text component of the GameObject that the script has been added to (_textUITime). It records the time the scene begins (in the _startTime variable), and each frame subtracts...