GameLoop not playing correctly?

I followed the Tanks! and SurivalShooter tutorial and mixed them to create a singleplayer Tank! game. The GameLoop I set up to spawn the tanks, edit the message text, etc. won't play correctly. It spawns the tank, and then the music just jitters and the game freezes but I can shoot but not move or anything. Here is the code for that class

 using System.Collections;
 using UnityEngine;
 using UnityEngine.UI;
 using PlayerInfo;
 using EnemyInfo;
 
 namespace Management
 {
     public class GameManager : MonoBehaviour
     {
         public int NumRoundsToWin = 5;            
         public float StartDelay = 3f;          
         public float EndDelay = 3f;              
         public CameraControl CameraControl;     
         public Text MessageText;                 
         public GameObject PlayerPrefab;       
         public GameObject EnemyPrefab;
         public TankManager[] Tanks;               
 
         private int RoundNumber;                 
         private WaitForSeconds StartWait;        
         private WaitForSeconds EndWait;          
         private TankManager RoundWinner;         
         private TankManager GameWinner;          
 
         private void Start()
         {
             StartWait = new WaitForSeconds (StartDelay);
             EndWait = new WaitForSeconds (EndDelay);
 
             SpawnAllTanks();
             SetCameraTargets();
 
             StartCoroutine (GameLoop ());
         }
 
         private void SpawnAllTanks()
         {
             for (int i = 0; i < Tanks.Length; i++)
             {
                 if (i == 0)
                     Tanks[i].Instance = Instantiate (PlayerPrefab, Tanks[i].SpawnPoint.position, Tanks[i].SpawnPoint.rotation) as GameObject;
                 else
                     Tanks[i].Instance = Instantiate (EnemyPrefab, Tanks[i].SpawnPoint.position, Tanks[i].SpawnPoint.rotation) as GameObject;
                 Tanks[i].Setup();
             }
         }
 
         private void SetCameraTargets()
         {
             Transform[] targets = new Transform[Tanks.Length];
 
             for (int i = 0; i < targets.Length; i++)
             {
                 targets[i] = Tanks[i].Instance.transform;
             }
 
             CameraControl.Targets = targets;
         }
 
         private IEnumerator GameLoop ()
         {
             yield return StartCoroutine (RoundStarting ());
 
             yield return StartCoroutine (RoundPlaying());
 
             yield return StartCoroutine (RoundEnding());
 
             if (GameWinner != null)
             {
                 Application.LoadLevel (Application.loadedLevel);
             }
             else
             {
                 StartCoroutine (GameLoop ());
             }
         }
 
         private IEnumerator RoundStarting ()
         {
             ResetAllTanks ();
             DisableTankControl ();
 
             CameraControl.SetStartPositionAndSize ();
 
             RoundNumber++;
             MessageText.text = "ROUND " + RoundNumber;
 
             yield return StartWait;
         }
 
         private IEnumerator RoundPlaying ()
         {
             EnableTankControl ();
 
             MessageText.text = string.Empty;
 
             while (!OneTankLeft())
             {
                 yield return null;
             }
         }
 
         private IEnumerator RoundEnding ()
         {
             // Stop tanks from moving.
             DisableTankControl ();
 
             RoundWinner = null;
 
             RoundWinner = GetRoundWinner ();
 
             if (RoundWinner != null)
                 RoundWinner.Wins++;
 
             GameWinner = GetGameWinner ();
 
             string message = EndMessage ();
             MessageText.text = message;
 
             yield return EndWait;
         }
 
         private bool OneTankLeft()
         {
             // Start the count of tanks left at zero.
             int numTanksLeft = 0;
 
             for (int i = 0; i < Tanks.Length; i++)
             {
                 if (Tanks[i].Instance.activeSelf)
                     numTanksLeft++;
             }
 
             return numTanksLeft <= 1;
         }
 
         private TankManager GetRoundWinner()
         {
             for (int i = 0; i < Tanks.Length; i++)
             {
                 if (Tanks[i].Instance.activeSelf)
                     return Tanks[i];
             }
 
             return null;
         }
 
         private TankManager GetGameWinner()
         {
             for (int i = 0; i < Tanks.Length; i++)
             {
                 if (Tanks[i].Wins == NumRoundsToWin)
                     return Tanks[i];
             }
 
             return null;
         }
 
         private string EndMessage()
         {
             string message = "DRAW!";
 
             if (RoundWinner != null)
                 message = RoundWinner.ColoredPlayerText + " WINS THE ROUND!";
 
             // Add some line breaks after the initial message.
             message += "\n\n\n\n";
 
             for (int i = 0; i < Tanks.Length; i++)
             {
                 message += Tanks[i].ColoredPlayerText + ": " + Tanks[i].Wins + " WINS\n";
             }
 
             if (GameWinner != null)
                 message = GameWinner.ColoredPlayerText + " WINS THE GAME!";
 
             return message;
         }
 
         private void ResetAllTanks()
         {
             for (int i = 0; i < Tanks.Length; i++)
             {
                 Tanks[i].Reset();
             }
         }
 
         private void EnableTankControl()
         {
             for (int i = 0; i < Tanks.Length; i++)
             {
                 Tanks[i].EnableControl();
             }
         }
 
         private void DisableTankControl()
         {
             for (int i = 0; i < Tanks.Length; i++)
             {
                 Tanks[i].DisableControl();
             }
         }
     }
 }