playermovement.cs

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

public class PlayerMovement : MonoBehaviour
{
    private System.Diagnostics.Stopwatch sw = new System.Diagnostics.Stopwatch();
    [SerializeField] private float GroundedWait = 60f;

    public CharacterController2D controller;
    public Animator animator;

    public float runSpeed = 40f;

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

    // Update is called once per frame
    void LateUpdate()
    {
        horizontalMove = Input.GetAxisRaw("Horizontal") * runSpeed;

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

        if (Input.GetButtonDown("Jump"))
        {
            jump = true;
            animator.SetBool("IsJumping", true);
            sw.Start();
        }

        if (Input.GetButtonDown("Crouch"))
        {
            crouch = true;
        } else if (Input.GetButtonUp("Crouch"))
        {
            crouch = false;
        }
    }

    public void OnLanding()
    {
        if (sw.ElapsedMilliseconds > GroundedWait)
        {
            animator.SetBool("IsJumping", false);
            sw.Reset();
        }
    }

    private void FixedUpdate()
    {
        //move char
        controller.Move(horizontalMove * Time.fixedDeltaTime,crouch,jump);
        jump = false;
    }
}