I can not get my character to crouch? Character not sliding on walls?

using System.Collections; using System.Collections.Generic; using UnityEngine; using UnityEngine.Events;

public class Walls2 : MonoBehaviour {

 public float maxSpeed = 10f;
 bool facingRight = true;
 public Animator anim;
   
 //sets up the grounded stuff
 bool grounded = false;
 bool touchingWall = false;
 public Transform groundCheck;
 public Transform wallCheck;
 float groundRadius = 0.2f;
 float wallTouchRadius = 0.2f;
 public LayerMask whatIsGround;
 public LayerMask whatIsWall;
 public float jumpForce = 700f;
 public float jumpPushForce = 700f;
 bool crouch = false;
 float horizontalMove = 0f;
 //double jump
 bool doubleJump = false;
   
  

 // Use this for initialization
 void Start()
 {

     anim = GetComponent<Animator>();
 }

 // Update is called once per frame
 void FixedUpdate()
 {
     horizontalMove = Input.GetAxisRaw("Move") * maxSpeed;
     // The player is grounded if a linecast to the groundcheck position hits anything on the ground layer.
     grounded = Physics2D.OverlapCircle(groundCheck.position, groundRadius, whatIsGround);
     touchingWall = Physics2D.OverlapCircle(wallCheck.position, wallTouchRadius, whatIsWall);
     anim.SetBool("Ground", grounded);

     if (grounded)
     {
         doubleJump = false;
         anim.SetBool("Up", false);
     }

     if (touchingWall)
     {
         grounded = false;
         doubleJump = false;
     }

     anim.SetFloat("speed", GetComponent<Rigidbody2D>().velocity.y);



     float move = Input.GetAxis("Move");
         anim.SetFloat("speed", Mathf.Abs(horizontalMove));
     

     anim.SetFloat("speed", Mathf.Abs(move));

     GetComponent<Rigidbody2D>().velocity = new Vector2(move * maxSpeed, GetComponent<Rigidbody2D>().velocity.y);

     // If the input is moving the player right and the player is facing left...
     if (move > 0 && !facingRight)
     {
         // ... flip the player.
         Flip();
     }// Otherwise if the input is moving the player left and the player is facing right...
     else if (move < 0 && facingRight)
     {
         // ... flip the player.
         Flip();
     }
 }
 void Update()
 {

     // If the jump button is pressed and the player is grounded then the player should jump.
     if ((grounded || !doubleJump) && Input.GetButtonDown("Up"))
     {
         anim.SetBool("Ground", false);
         anim.SetBool("Up", true);
         GetComponent<Rigidbody2D>().AddForce(new Vector2(0, jumpForce));

         if (!doubleJump && !grounded)
         {
             doubleJump = true;
         }

     }
     if (grounded && Input.GetButtonDown("Down"))
     {

         crouch = true;
         
         GetComponent<Rigidbody2D>().AddForce(new Vector2(0, 0));
     }
     else if (Input.GetButtonUp("Down"))
     {
         crouch = false;
     }


     if (touchingWall && Input.GetButtonDown("Up"))
     {
         WallJump();
     }


     void WallJump()
     {
         GetComponent<Rigidbody2D>().AddForce(new Vector2(jumpPushForce, jumpForce));
     }

 }
     void Flip()
     {

         // Switch the way the player is labelled as facing
         facingRight = !facingRight;

         //Multiply the player's x local cale by -1
         Vector3 theScale = transform.localScale;
         theScale.x *= -1;
         transform.localScale = theScale;
     }
 

}