CharacterController

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

[RequireComponent(typeof(CharacterController))]

public class SC_CharacterController : MonoBehaviour
{

    public float speed = 7.5f;
    public float jumpSpeed = 8.0f;
    public float gravity = 20.0f;
    public float lookSpeed = 2.0f;
    public float lookXLimit = 45.0f;

    public Camera playerCamera;
    CharacterController characterController;
    Vector3 moveDirection = Vector3.zero;
    Vector2 rotation = Vector2.zero;

    [HideInInspector]
    public bool canMove = true;

    void Start()
    {
        characterController = GetComponent<CharacterController>();
        rotation.y = transform.eulerAngles.y;
    }

    void Update()
    {
        if (characterController.isGrounded)
        {

            Vector3 _foward = transform.TransformDirection(Vector3.forward);
            Vector3 _right = transform.TransformDirection(Vector3.right);
            float _horizontal = Input.GetAxis("Horizontal");
            float _vertical = Input.GetAxis("Vertical");

            float curSpeedX = canMove ? speed * _vertical : 0;
            float curSpeedY = canMove ? speed * _horizontal : 0;

            moveDirection = (_foward * curSpeedX) + (_right * curSpeedY);

            if (Input.GetButton("Jump") && canMove)
            {
                moveDirection.y = jumpSpeed;
            }

        }

        moveDirection.y -= gravity * Time.deltaTime;

        characterController.Move(moveDirection * Time.deltaTime);

        if (canMove)
        {

            float _mouseX = Input.GetAxis("Mouse X");
            float _mouseY = Input.GetAxis("Mouse Y");

            rotation.y += _mouseX * lookSpeed;
            rotation.x += -_mouseY * lookSpeed;
            rotation.x = Mathf.Clamp(rotation.x, -lookXLimit, lookXLimit);
            playerCamera.transform.localRotation = Quaternion.Euler(rotation.x, 0, 0);
            transform.eulerAngles = new Vector2(0, rotation.y);

        }
    }
}