Added code to address #6
Using a quad with tex applied immediately in front of the camera with no collider & no shadows, then applying a new shader copied from the Unity Answers area to use alpha transparency with a diff tex & have it be unlit.
Methods in GameManager decide when to fade out / fade in & when to switch materials for the different messages
This part isn't compelete yet, still need to add a method to handle the end-game outro, and think about using this for death messages too. That, and get better textures to use