Not loading correct Scene/Level

I'm literally...99% done with making my first little game. The only thing standing in my way is ending it off.

I'm having an issue loading my "Win" screen after the player kills all enemies. It seems to load my Game Over scene instead. If my player dies, my game over scene loads, if my player wins, my game over scene loads. It never calls my Win scene. All other scenes load fine.

I have all my scenes in the build setting as follows.

• 0-Intro

• 1-Menu

• 2-Instructions

• 3-Scene1(main game)

• 4.Win

• 5.Gameover

Below is my GameWin Script, that I have placed in the scripts game object on my main scene..it's supposed to call the "Win" scene. I know it works because, if I change "Win" to a scene that doesn't exist, it gives me an error stating that the scene is not in the build settings.

Example...

Level 'Winner' (-1) couldn't be loaded because it has not been added to the build settings. To add a level to the build settings use the menu File->Build Settings... UnityEngine.Application:LoadLevel(String) GameWinScript:Update() (at Assets/Scripts/GameWinScript.cs:11)

It's just not bringing up the right scene. I've tried moving the scene down and up in the build settings with the same results...

 using UnityEngine;
 using System.Collections;
 
 public class GameWinScript : MonoBehaviour {
 
 
     
     void Update()
     {
         if ((GameObject.FindGameObjectsWithTag("Enemy")).Length == 0)
             Application.LoadLevel("Win");
     }
 
     }

Please help guys, any idea on what I could be doing wrong? This is the last piece...

EDIT to show more scripts...

Player Script (OnDestroy)

 using UnityEngine;
 
 /// <summary>
 /// Player controller and behavior
 /// </summary>
 public class PlayerScript : MonoBehaviour
 {
     /// <summary>
     /// 1 - The speed of the ship
     /// </summary>
     public Vector2 speed = new Vector2(50, 50);
     
     // 2 - Store the movement
     private Vector2 movement;
     
     void Update()
     {
         // 3 - Retrieve axis information
         float inputX = Input.GetAxis("Horizontal");
         float inputY = Input.GetAxis("Vertical");
         
         // 4 - Movement per direction
         movement = new Vector2(
             speed.x * inputX,
             speed.y * inputY);
 
         // ...
         
         // 5 - Shooting
         bool shoot = Input.GetButtonDown("Fire1");
         shoot |= Input.GetButtonDown("Fire2");
         // Careful: For Mac users, ctrl + arrow is a bad idea
         
         if (shoot)
         {
             WeaponScript weapon = GetComponent<WeaponScript>();
             if (weapon != null)
             {
                 // false because the player is not an enemy
                 weapon.Attack(false);
                 SoundEffectsHelper.Instance.MakePlayerShotSound();
             }
         }
         
         // ...
         
         // 6 - Make sure we are not outside the camera bounds
         var dist = (transform.position - Camera.main.transform.position).z;
         
         var leftBorder = Camera.main.ViewportToWorldPoint(
             new Vector3(0, 0, dist)
             ).x;
         
         var rightBorder = Camera.main.ViewportToWorldPoint(
             new Vector3(1, 0, dist)
             ).x;
         
         var topBorder = Camera.main.ViewportToWorldPoint(
             new Vector3(0, 0, dist)
             ).y;
         
         var bottomBorder = Camera.main.ViewportToWorldPoint(
             new Vector3(0, 1, dist)
             ).y;
         
         transform.position = new Vector3(
             Mathf.Clamp(transform.position.x, leftBorder, rightBorder),
             Mathf.Clamp(transform.position.y, topBorder, bottomBorder),
             transform.position.z
             );
 
     }
 
     //PlayerScript.cs
     //....
 
 
     void OnCollisionEnter2D(Collision2D collision)
     {
         bool damagePlayer = false;
         
         // Collision with enemy
         EnemyScript enemy = collision.gameObject.GetComponent<EnemyScript>();
         if (enemy != null)
         {
             // Kill the enemy
             HealthScript enemyHealth = enemy.GetComponent<HealthScript>();
             if (enemyHealth != null) enemyHealth.Damage(enemyHealth.hp);
             
             damagePlayer = true;
         }
         
         // Damage the player
         if (damagePlayer)
         {
             HealthScript playerHealth = this.GetComponent<HealthScript>();
             if (playerHealth != null) playerHealth.Damage(1);
         }
     }
     
     void FixedUpdate()
     {
         // 5 - Move the game object
         rigidbody2D.velocity = movement;
     }
 
     void OnDestroy()
     {
         // Game Over.
         // Add the script to the parent because the current game
         // object is likely going to be destroyed immediately.
         Application.LoadLevel("GameOver");
     }
 }

Game Over Script

 /// Start or quit the game
 /// </summary>
 public class GameOverScript : MonoBehaviour
 {
     void OnGUI()
     {
         const int buttonWidth = 120;
         const int buttonHeight = 60;
         
         if (
             GUI.Button(
             // Center in X, 1/3 of the height in Y
             new Rect(
             Screen.width * .3f, Screen.height * .74f,
             buttonWidth,
             buttonHeight
             ),
             "Retry!"
             )
             )
         {
             // Reload the level
             Application.LoadLevel("Scene1");
         }
         
         if (
             GUI.Button(
             // Center in X, 2/3 of the height in Y
             new Rect(
             Screen.width * .62f, Screen.height * .74f,
             buttonWidth,
             buttonHeight
             ),
             "Back to menu"
             )
             )
         {
             // Reload the level
             Application.LoadLevel("Menu");
         }
     }
 }

Edit #2 to include health script

Health Script

 using UnityEngine;
 
 /// <summary>
 /// Handle hitpoints and damages
 /// </summary>
 public class HealthScript : MonoBehaviour
 {
     /// <summary>
     /// Total hitpoints
     /// </summary>
     public int hp = 1;
     
     /// <summary>
     /// Enemy or player?
     /// </summary>
     public bool isEnemy = true;
     
     /// <summary>
     /// Inflicts damage and check if the object should be destroyed
     /// </summary>
     /// <param name="damageCount"></param>
     public void Damage(int damageCount)
     {
         hp -= damageCount;
         
         if (hp <= 0)
         {
             // Dead!
             Destroy(gameObject);
         }
     }
     
     void OnTriggerEnter2D(Collider2D otherCollider)
     {
         // Is this a shot?
         ShotScript shot = otherCollider.gameObject.GetComponent<ShotScript>();
         if (shot != null )
         
         {
             Debug.Log("Player Triggered by " + otherCollider.gameObject.name + ", Shot is: " + 
                       shot.isEnemyShot.ToString() + ", I am: " + isEnemy.ToString() + ", shot damage: " +
                       shot.damage.ToString() + ", health: " + hp.ToString() + ", Time: " +
                       Time.timeSinceLevelLoad.ToString());
 
             // Avoid friendly fire
             if (shot.isEnemyShot != isEnemy)
             {
                 Damage(shot.damage);
                 
                 // Destroy the shot
                 Destroy(shot.gameObject); // Remember to always target the game object, otherwise you will just remove the script
 
         
             }
     
         }
     
     }
 }