PlayerMovement Script

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

public class PlayerMovement : MonoBehaviour
{
    public CharacterController controller;
    public Animator animator;

    public float runSpeed = 40f;
    public bool isPlayer2 = false;

    float horizontalMove = 0f;
    bool jump = false;
    bool crouch = false;

    // Update is called once per frame
    void Update()
    {
        if (!isPlayer2)
            horizontalMove = Input.GetAxisRaw("Horizontal") * runSpeed;
        else if (isPlayer2)
            horizontalMove = Input.GetAxisRaw("Horizontal2") * runSpeed;

        animator.SetFloat("Speed", Mathf.Abs(horizontalMove));

        if (!isPlayer2 && Input.GetButtonDown("Jump"))
        {
            jump = true;
            animator.SetBool("IsJumping", true);
        }
        else if (isPlayer2 && Input.GetButtonDown("Jump2"))
        {
            jump = true;
            animator.SetBool("IsJumping", true);
        }

        if (!isPlayer2 && Input.GetButton("Crouch"))
        {
            crouch = true;
        }
        else if (!isPlayer2 && Input.GetButtonUp("Crouch"))
        {
            crouch = false;
        }
        else if (isPlayer2 && Input.GetButton("Crouch2"))
        {
            crouch = true;
        } else if (isPlayer2 && Input.GetButtonUp("Crouch2"))
        {
            crouch = false;
        }
    }

    void FixedUpdate() // better method for movement
    {
        controller.Move(horizontalMove * Time.fixedDeltaTime, crouch, jump);
        jump = false;
    }

    public void OnLanding()
    {
        animator.SetBool("IsJumping", false);
    }

    public void OnCrouching(bool isCrouching)
    {
        animator.SetBool("IsCrouching", isCrouching);
    }
}