2D Character grabing the wall

Hello guys, I'm with problems on my character move. When I jump to one wall my character grab the wall like spider man if I keep the direction buttom pressed, look like the gravity is disabled.

Thats my code:

   using UnityEngine;
   using System.Collections;
     
     [RequireComponent(typeof(Rigidbody))]
     [RequireComponent(typeof(CapsuleCollider))]
     
     public class movePlayer : MonoBehaviour
     {
         public float speed = 10.0f;
         public float gravity = 10.0f;
         public float maxVelocityChange = 10.0f;
         public float jumpHeight = 2.0f;
         private bool grounded = false;
         public float airMove = 5.0f;
         public float distGround = 1;
         public bool checkGround;
 
         void Awake()
         {
             rigidbody.freezeRotation = true;
             rigidbody.useGravity = false;
         }
         void Update()
         {
             
            //Debug.Log("Ground:" + grounded);
            //Debug.Log("Can Jump:" + canJump);
            //Debug.Log(rigidbody.velocity.x);
     
             checkGround = Physics.Raycast(transform.position, -Vector3.up, distGround);
     
     
                 Debug.LogWarning(checkGround);
               
     
                // Calculate how fast we should be moving
                Vector3 targetVelocity = new Vector3(Input.GetAxis("Horizontal"), 0, 0);
                targetVelocity = transform.TransformDirection(targetVelocity);
                targetVelocity *= speed;
     
                // Apply a force that attempts to reach our target velocity
                Vector3 velocity = rigidbody.velocity;
                Vector3 velocityChange = (targetVelocity - velocity);
                velocityChange.x = Mathf.Clamp(velocityChange.x, -maxVelocityChange, maxVelocityChange);    
                velocityChange.y = 0;
                rigidbody.AddForce(velocityChange, ForceMode.VelocityChange);
     
                // Jump
     
                if (checkGround)
                {
                    speed = 10;
                }               
            
            if (checkGround && Input.GetButton("Jump"))
            {    
                rigidbody.velocity = new Vector3(velocity.x, CalculateJumpVerticalSpeed(), velocity.z);        
            }    
            if (!checkGround && rigidbody.velocity.x > 0)
            {
                if (Input.GetKey(KeyCode.A))
                {
     
                    speed = 5;
                }    
            }
            else if (!checkGround && rigidbody.velocity.x < -0)
            {
                if (Input.GetKey(KeyCode.D))
                {
     
                    speed = 5;
                }  
            }
             // We apply gravity manually for more tuning control
            if (!checkGround)
            {
                rigidbody.AddForce(new Vector3(0, -gravity * rigidbody.mass, 0));
            }
         }
         float CalculateJumpVerticalSpeed()
         {
             // From the jump height and gravity we deduce the upwards speed 
             // for the character to reach at the apex.
             return Mathf.Sqrt(2 * jumpHeight * gravity);
         } 
     }