Making High Scores and scores via GUITexts

What's up Unitarians?

So I'm making this runner game, and I have a high score system - that should be working PERFECTLY, but it isn't. I have multiple GUITextures and GUITexts, and the score is raised by one every update, so your score can get pretty high. The code, named Entity, is pretty simple and self-explanatory. There are no errors in the console, so I have no idea what's happening.

 using UnityEngine;
 using System.Collections;
 
 public class Entity : MonoBehaviour {
 
     public float health;
     public GameObject ragdoll;
 
     //GUI Stuffs
     public GUITexture GameOverGUI;
     public GUITexture TryAgainGUI;
     public GUITexture YourScoreWasGUI;
     public GUIText ScoreGUIText;
     public GUITexture GameOverBackgroundGUI;
 
     //Score Stuffs
     public GUIText HighScore;
     public GUIText CurrentScore;
     private int highscore;
     private int score = 0;
 
     public void Start(){
         Instantiate(HighScore, new Vector3 (1.0f, 1.0f, 0f), Quaternion.identity);
         Instantiate(CurrentScore, new Vector3 (1.0f, 0.9f, 0f), Quaternion.identity);
 
         if (PlayerPrefs.GetInt("High Score Endless") == null){
             PlayerPrefs.SetInt("High Score Endless", 0);
         }
 
         highscore = PlayerPrefs.GetInt("High Score");
 
         HighScore.text = "Highscore: " + highscore;
     
     }
 
     public void Update(){
         //Score Holder
         score ++;
 
         CurrentScore.text = "Score: " + score;
 
         if (score > highscore){
             highscore = score;
             HighScore.text = "Highscore: " + highscore;
         }
     }
 
     public void TakeDamage(float dmg) {
         health -= dmg;
         
         if (health <= 0) {
             Die();    
         }
     }
     
     public void Die() {
         ToggleVisibility();    
 
         Destroy(this.gameObject);
 
         PlayerPrefs.SetInt("High Score Endless", highscore);
 
         ScoreGUIText.text = "" + score;
 
     }
 
     public void ToggleVisibility(){
 
         Instantiate(ScoreGUIText, new Vector3 (0.55f, 0.28f, 0f), Quaternion.identity);
         Instantiate(YourScoreWasGUI, new Vector3 (0.43f, 0.3f, 0f), Quaternion.identity);
         Instantiate(GameOverGUI, new Vector3 (0.5f, 0.65f, 0f), Quaternion.identity);
         Instantiate(TryAgainGUI, new Vector3 (0.5f, 0.425f, 0f), Quaternion.identity);
         Instantiate(GameOverBackgroundGUI, new Vector3 (0.5f, 0.5f, 0f), Quaternion.identity);
     }
 
 }