Added sound effects and music.

AlientAttack.MonoGame/AlienAttackGame.cs

@@ -1,8 +1,10 @@
 using AlienAttack.MonoGame.GameLoops;
 using AlienAttack.MonoGame.View;
 using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Audio;
 using Microsoft.Xna.Framework.Graphics;
 using Microsoft.Xna.Framework.Input;
+using Microsoft.Xna.Framework.Media;
 using System;
 using System.Runtime.InteropServices;
 
@@ -44,6 +46,28 @@ public class AlienAttackGame : Game
         base.Initialize();
 
         MaximizeWindow();
+
+        PlayBackgroundMusic();
+    }
+
+    private void PlayBackgroundMusic()
+    {
+        Song song = Content.Load<Song>($@"Music\Untitled");
+
+        // Set whether the song should repeat when finished
+        MediaPlayer.IsRepeating = true;
+
+        // Adjust the volume (0.0f to 1.0f)
+        MediaPlayer.Volume = 0.5f;
+
+        // Check if the media player is already playing, if so, stop it
+        if (MediaPlayer.State == MediaState.Playing)
+        {
+            MediaPlayer.Stop();
+        }
+
+        // Start playing the background music
+        MediaPlayer.Play(song);
     }
 
     private void ConfigureWindow()
@@ -86,7 +110,7 @@ public class AlienAttackGame : Game
         GraphicsDevice.Clear(Color.Black);
 
         // TODO: Add your drawing code here
-        _gameLoop.Draw();
+        _gameLoop.Draw(gameTime);
 
         base.Draw(gameTime);
     }