Creating a Main Menu

Now that we have some game play, let's add in a little more organization by adding a main menu. This will make use of Unity's uGUI system. (Unity also has the legacy immediate-mode GUI, as well as the new UIElements system.) Our GUI will have a little bit of life with some animation and sound:

1. Unity itself gives us a great free starting package. Go to the Asset Store and download and import the UI Samples package by Unity Technologies.
2. To see what we are dealing with, find the scene at Unity UI Samples | Scenes | Menu 3D and run it. We will modify it for our purposes.
3. Duplicate the scene and rename it to SE MainMenu. Store the duplicate in your project's Scenes folder (not UI Samples | Scenes).
4. Select the tab for your Game view. There is a drop-down menu at the top of the Game view that allows you to set the screen dimensions for game play. Select the 16:9 Aspect choice. There is nothing magical about these dimensions. You might...