Time for action – add both scenes to Build List
There's just one last thing we need to do. Unity keeps a laundry list of scenes to bundle together when we run the game called the Build List. If we call a scene that is not on the Build List, Unity will throw an error and the game won't work. And we don't want that.
Navigate to File | Build Settings...; the Build Settings panel appears.
Click on the Add Current button to add the title scene to the Build Settings page.
Close the Build Settings panel.
Navigate to File | Save Scene, to save the title scene.
In the Project panel, double-click on the game scene to switch to it.
Follow the same process to add the game scene to the Build Settings, and then close the Build Settings window. Alternately, you can click-and-drag the game scene from the Project panel into the Build Settings panel.
Press the Play button to test the game.
Tip
Order! Order!
The order in which you add scenes to the Build List matters. Scenes appear from the top to down. If you put...
