To make our game fully functioning, we need to tweak a couple of things.
First of all, we need to link the previous function to reload the scene when the player presses the Play Again? button. To do so, add the UI_GameOver script to the button, then in the On Click() tab of the Button component, press the + button to add an event. Drag and drop the script just added, and select the PlayAgain() function. Here is how the final setup should look:
Next, we don't want the Game Over Screen to always be visible when we start the game, so we need to disable it. To achieve that, select the Game Over Screen in the Hierarchy panel, and in the Inspector uncheck the checkbox next to its name. Here is a screenshot of that:
Lastly, we need to select our Score Label, because we need to set both the number of points to the end of the game, and the Game Over Screen reference...