Add a lot of stuff

Assets/Scripts/BGMManager.cs

@@ -0,0 +1,23 @@
+using UnityEngine;
+
+namespace Scampz.GameJam.Assets.Scripts
+{
+  public class BGMManager : MonoBehaviour
+  {
+    public static BGMManager Instance { get; private set; }
+    
+    [SerializeField]
+    private AudioSource audioSource;
+
+    [SerializeField]
+    private AudioClip[] backgroundMusic;
+
+    private void Awake()
+    {
+      if (Instance == null)
+        Instance = this;
+    }
+
+
+  }
+}