Corrected the cause of malfunction in scene other than game: Concat () is a...

Corrected the cause of malfunction in scene other than game: Concat () is a Linq method, so it returns the result of performing the action.

Assets/Script/JudgeManager.cs

@@ -351,7 +351,7 @@ public class JudgeManager : MonoBehaviour
     }
 }
 
-class MotionGageManager : MonoBehaviour
+class MotionGageManager
 {
     public GameObject motionGuage;
     private float elapsedMotion;

Assets/Script/TrackManager.cs

@@ -94,7 +94,7 @@ public class TrackManager : MonoBehaviour {
         var stretched = Enumerable.Empty<TrackInfo>();
         Enumerable.Range(0, 1 + (4 / tracks.Count()))
                   .ToList()
-                  .ForEach(x => stretched.Concat(tracks));
+                  .ForEach(x => stretched = stretched.Concat(tracks));
 
         return stretched;
     }
@@ -120,9 +120,9 @@ public class TrackManager : MonoBehaviour {
         Artist.text = "Artist  :" + info.Artist.ToString();
         BPM.text    = "BPM    :"  + info.BPM   .ToString();
         
-        trackInfo.GetComponentsInChildren<Transform>()
-                 .ToList()
-                 .ForEach(x => Destroy(x));
+        trackInfo.transform.Cast<Transform>()
+                           .ToList()
+                           .ForEach(x => Destroy(x.gameObject));
 
         info.TrackList
             .ForEach(x => Instantiate(trackInfoItemPrefab, trackInfo.transform)