Why would only one part of code work but the rest not? No compile errors in code. The only part of the code that works is the (Input.GetKeyDown(keycode.Space)), everything else does not

using UnityEngine; using UnityEngine.UI; using System.Collections;

public class Player_Movement : MonoBehaviour {

 public float speed = 5.0f;
 public Transform snapLeft;
 public Transform snapRight;
 public Transform snapCenter;
 public bool triggerCheck;
 public GameObject player; 
 public float move;
 public float jump;
 private GameObject cube;
 public bool disable = false;
 public static  int distance;
 public static Text distanceText;
 public AudioSource switchLanes;
 public float i;
 public bool isleft;
 public int currentScore;





 void Start () 
 
 {

     distance = 0;

     move = 1f;

     //jump = 0f;

     switchLanes = GetComponent<AudioSource>();

     isleft = false;

     player.GetComponent<Animation>().Play("run");
    


 }

 // Reset Jump

 void OnTriggerEnter(Collider other) {

     if (other.gameObject.tag == "Player") {
     
         //jump = 0f;
     
     }

 }
     
 void Update()

 {
     // Slow down time

     if (Input.GetKey(KeyCode.Space))
     {

         if (Time.timeScale == 1.0f)
         {

             Time.timeScale = 0.5f;

         }

     }

     // Resume Speed

     if (Input.GetKeyUp(KeyCode.Space))

     {
         if (Time.timeScale < 1.0f)
         {

             Time.timeScale = 1.0f;

         }
     }







     distance = distance + 1;
     distanceText.text = "Distance: " + distance.ToString();


    
   
     if (Input.GetKeyDown(KeyCode.W) || Input.GetKeyDown(KeyCode.UpArrow)) /* && jump == 0f)*/
     {
         
         if (gameObject.tag == "Player")
         {

             if (disable == false)
             {

                 //player.GetComponent<Animator>().Play("Jump");
                 player.GetComponent<Animator>().Play("New_Jump");

                // jump = 1f;
         
             }
         }
     }
         

 
     // Slide under object (Scale Collider)

    /* if (Input.GetKeyDown(KeyCode.S) && jump == 0f)

     {
         //if (gameObject.tag == "Player")
         {
             player.GetComponent<CharacterController>().height = .9f;
             player.GetComponent<CharacterController>().center = new Vector3(0, .45f, 0);
             disable = true;
             player.GetComponent<Animator>().Play("Slide");

             StartCoroutine("Wait");

         }

     }

*/

      // Snap Left

     if (Input.GetKeyDown (KeyCode.A) && move == 1f || Input.GetKeyDown (KeyCode.LeftArrow) && move == 1f) {
         
         if (gameObject.tag == "Player") {
             Debug.Log("Move_Left");
             transform.position = snapLeft.transform.position;
             move = 0f;

             switchLanes.Play ();
             //i = 4f;

         }
             //if (isleft == true) {
              
                 //move = 0f;
             
             //}

     }

         // Set Center from right
     
     if (Input.GetKeyDown (KeyCode.A) && move == 2f|| Input.GetKeyDown (KeyCode.LeftArrow) && move == 2f) {
         
             if (gameObject.tag == "Player") {
             
                 transform.position = snapCenter.transform.position;
                 Debug.Log ("snap center from RIGHT");
                 move = 1f;
                 Debug.Log ("value of move =" + move);
                 switchLanes.Play ();
             }
         
         }

         //  Snap Right
     
     if (Input.GetKeyDown (KeyCode.D) && move == 1f  || Input.GetKeyDown (KeyCode.RightArrow) &&  move == 1f ) {
         
             if (gameObject.tag == "Player") {

                 transform.position = snapRight.transform.position;
                 Debug.Log ("snap full RIGHT from center");
                 move = 2f;
                 Debug.Log ("value of move =" + move);
                 switchLanes.Play ();
             }
         
         }

         // Snap Center from left
     
     if (Input.GetKeyDown (KeyCode.D) && move == 0f || Input.GetKeyDown (KeyCode.RightArrow) && move == 0f ) {
         
             if (gameObject.tag == "Player") {
             
                 transform.position = snapCenter.transform.position;
                 Debug.Log ("snap center from left");
                 move = 1f;
                 Debug.Log ("value of move =" + move);
                 switchLanes.Play ();

             }            
         }

     }


 // Reset Character Controller

/* IEnumerator Wait() {

     yield return new WaitForSeconds(1);
     player.GetComponent<CharacterController>().height = 1.85f;
     player.GetComponent<CharacterController>().center = new Vector3(0, .9f, 0);
     disable = false;
    
     
 }

}