how to save and load the game state

i want to save the game state and want to load it on resume button click.But i dont knw how to do that.,i tried the snippet

 using UnityEngine;
 using System.Collections;
 
 public class SaveState : MonoBehaviour {
 
     // Use this for initialization
     void Start () {
         Load ();
     }
     
     // Update is called once per frame
     void Update () {
      
     }
     void Load(){
         if (PlayerPrefs.GetFloat ("x") != null) 
         {
             transform.position= new Vector3(PlayerPrefs.GetFloat("x"),PlayerPrefs.GetFloat("y"),PlayerPrefs.GetFloat("z"));
                 }
         transform.position = new Vector3 (transform.position.x, transform.position.y, transform.position.z);
         Save ();
         }
     void Save()
     {
         PlayerPrefs.SetFloat("x",transform.position.x);
         PlayerPrefs.SetFloat("y",transform.position.y);
         PlayerPrefs.SetFloat("z",transform.position.z);
     }
 }

when i attach it to my new game script,after closing when i again click on new game,cubes in my game get displace and also texture i attach to the cubes donot load. why this happen..?? what am i doing wrong ??