Added intro screen.

Assets/Scripts/Intro/Intro.cs

@@ -0,0 +1,46 @@
+using UnityEngine;
+using System.Collections;
+
+public class Intro : FadeCallback
+{
+    public AudioSource music;
+
+    public MonoBehaviour faderScript; // Reference to the Fader script for handling the fade effect
+
+    private IEnumerator playAudioCoroutine;
+
+    // Start is called once before the first execution of Update after the MonoBehaviour is created
+    void Start()
+    {
+        
+    }
+
+    // Update is called once per frame
+    void Update() { }
+
+    public override void OnFadeStarted()
+    {
+        playAudioCoroutine = PlayAudioThenActivateGameObject();
+        StartCoroutine(playAudioCoroutine);
+    }
+
+    public override void OnFadeComplete() { }
+
+    public void forceStopAudioCoroutine()
+    {
+        if (playAudioCoroutine != null)
+        {
+            StopCoroutine(playAudioCoroutine);
+            playAudioCoroutine = null;
+        }
+
+        music.Stop();
+    }
+
+    private IEnumerator PlayAudioThenActivateGameObject()
+    {
+        music.Play();
+        yield return new WaitUntil(() => music.time >= music.clip.length);
+        faderScript.Invoke("resetFader", 0.0f);
+    }
+}