Highscore Save

I have write a Script for save the highscore, but it doesn't run. sorry for the German words. thanks for help me !

using UnityEngine; using System.Collections;

public class Counter : MonoBehaviour { public static int points; int oldhighscore; bool gameStarted = false; bool gameFinished = false; public GameObject myPlayer; // Use this for initialization void Start () { GameEventManager.GameStart += spielWurdeGestartet; GameEventManager.GameOver += spielWurdeBeendet; }

 // Update is called once per frame
 void Update () {
     
     if (gameStarted) {
         points++;
         guiText.text = "" + points;
         
     } else {
         
         guiText.text = "press ALTGR to start and SPACE to jump";
     }

     
     if (gameFinished == true) {
         gameStarted = false;
         guiText.text = "You reached " + points + " points, press ALTGR to restart";
         if (points > oldhighscore) {
             PlayerPrefs.SetInt ("highscore", points);
             oldhighscore = points;
         }
         if (Input.GetKeyDown (KeyCode.AltGr)) {
             gameStarted = true;
             gameFinished = false;
             Application.LoadLevel (Application.loadedLevel);
         }
     }
     
     
     if (Input.GetKeyDown (KeyCode.AltGr)) {
         gameStarted = true;                      
     }
     
 }
 
 
 public void spielWurdeBeendet() {
     gameFinished = true; 
     
 }
 
 public void spielWurdeGestartet() {
     points = 0;
     gameStarted = true; 
 }              

}