Time for action – creating the MarsRunnerPlayScreen class

To create a new gameplay screen for Mars Runner, perform the following steps:

1. 1. Add a new class file to the Screens folder of the Mars Runner project. Name the class file MarsRunnerPlayScreen.cs.

2. 2. Modify the namespace line in the newly created class by removing .Screens from the end of the namespace. The new line should read as follows:

   namespace Mars_Runner

3. 3. Add the following using directives at the beginning of the class file:

   using Microsoft.Xna.Framework;
   using Microsoft.Xna.Framework.Content;
   using Microsoft.Xna.Framework.Graphics;
   using Microsoft.Xna.Framework.Input;

4. 4. Modify the declaration of the class to derive it from the GameScreen class as follows:

   class MarsRunnerPlayScreen : GameScreen

5. 5. Add fields to the MarsRunnerPlayScreen class as follows:

   #region Fields
   ContentManager content;
   Random random = new Random();
   #endregion

6. 6. In the MainMenuScreen class, inside the Handle Input region, modify the PlayGameMenuEntrySelected...