Player Movement + Climbing

Player.cs

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

public class Player : MonoBehaviour
{

    float speedX = 10f;
    bool isClimbing = false;
    float inputX;
    float inputY;

    void Update()
    {
       Movement();
       Climbing();
    }

    void Movement()
    {
        inputX = Input.GetAxis("Horizontal");
        inputY = Input.GetAxis("Vertical");
        GetComponent<Rigidbody2D>().velocity = new Vector2(inputX * speedX, GetComponent<Rigidbody2D>().velocity.y);
    }

    void Climbing()
    {
        if (isClimbing)
        {
            GetComponent<Rigidbody2D>().velocity = new Vector2(GetComponent<Rigidbody2D>().velocity.x, inputY * speedX);
        }
    }

    private void OnCollisionEnter2D(Collision2D collision)
    {
        if(collision.transform.tag == "Wall")
        {
            isClimbing = true;
            GetComponent<SpriteRenderer>().color = Color.red;
        }
    }

    private void OnCollisionExit2D(Collision2D collision)
    {
        if (collision.transform.tag == "Wall")
        {
            isClimbing = false;
            GetComponent<SpriteRenderer>().color = Color.blue;
        }
    }
}