character climb

I looked at a tutorial on how to make a basic FPS controller and coud not figure out how to make the character climb a wall when he jumps against it and it has the tag JumpBoost. using System.Collections; using System.Collections.Generic; using UnityEngine;

public class PlayerMovement : MonoBehaviour {

public float speed = 2f;

 public float sens = 2f;

 public float jumpForce = 4f    ;

 public float gravity;

 public float climbForce;

 public Rigidbody rB;

 private Collider other;

 CharacterController player;

 public GameObject eyes;

 float moveFB, moveLR, rotX, rotY, verticalVelocity;
 private bool hasJumped, isCrouched;

 // Use this for initialization
 void Start () {
     Cursor.visible = false;
     Cursor.lockState = CursorLockMode.Locked;
     player = GetComponent<CharacterController> ();
     other = GetComponent<Collider> ();
 }
 
 // Update is called once per frame
 void Update () {
     Movement ();
     if (Input.GetButtonDown ("Jump")) 
     {
         hasJumped = true;        
     }
     ApplyGravity ();

     if (Input.GetButtonDown ("Crouch")) 
     {
         if (isCrouched == false) 
         {
             isCrouched = true;
             player.height = player.height / 2;    
         }
     }
     if (Input.GetButtonUp ("Crouch"))
     {
         if (isCrouched == true)
         {
             isCrouched = false;
             player.height = player.height * 2;    
         }
     }
 }

 public void Movement()
 {
     moveFB = Input.GetAxis ("Vertical") * speed;
     moveLR = Input.GetAxis("Horizontal") * speed;

     rotX = Input.GetAxis ("Mouse X") * sens;
     rotY = Input.GetAxis ("Mouse Y") * sens;


     Vector3 movement = new Vector3 (moveLR,verticalVelocity,moveFB);
     Vector3 climb = new Vector3 (0, climbForce, 0);
     transform.Rotate (0,rotX,0);
     movement = transform.rotation * movement;
     climb = transform.position.y * climb;
     player.Move (movement * Time.deltaTime);
     player.Move (climb * Time.deltaTime);
     eyes.transform.Rotate (-rotY, 0, 0);

     if (Input.GetKeyDown (KeyCode.LeftShift)) 
     {
         speed = 7f;
     }
     if (Input.GetKeyUp (KeyCode.LeftShift)) 
     {
         speed = 4f;
     }
 }


 private void ApplyGravity()
 {
     if (player.isGrounded == true) 
     {
         if (hasJumped == false) 
         {
             verticalVelocity = Physics.gravity.y * gravity;
         } 
         else 
         {
             verticalVelocity = jumpForce;
         }
     } 
     else 
     {
         verticalVelocity += Physics.gravity.y * gravity * Time.deltaTime;
         verticalVelocity = Mathf.Clamp (verticalVelocity, -50f, jumpForce);
         hasJumped = false;
     }
     if (player.isGrounded == false) 
     {
         if (other.GetComponent<Collider> ().tag == "JumpBoost" && hasJumped == true) 
         {
             Vector3 climb = new Vector3 (0,climbForce,0);
         }
     }
 }

}

I tried making a climb Vector3 but my player always bugs out and gets hit by gravity when he hits the object.