Merged Score Screen with GUI Scripts

***Make sure the level has a Player Data prefab (I've added it to the
Level Settings Prefab to make this easier) in order for there to be no
errors when the Score Screen appears. It will used the last logged in
player, so make sure you have someone logged in from the start screen
(don't have to go to the level from the start screen, it will
automatically load the last logged in player) to avoid errors***
Merging Conflict