Player

using UnityEngine;

namespace Scripts28785
{
    public class Player : MonoBehaviour
    {
        private const string Horizontal = "Horizontal";
        private const string Vertical = "Vertical";
        private const string RunMultiplier = "RunMultiplier";
        private const string Run = "Run";
        private readonly float _defaultSpeed = 1f;

        private Rigidbody2D _body2D;
        private Animator _animator;
        public float _speed = 3f;
        private Camera _camera;
        private Vector3 _faceDirection;

        private void Awake()
        {
            _body2D = GetComponent<Rigidbody2D>();
            _animator = GetComponent<Animator>();
        }

        private void Start()
        {
            _camera = Camera.main;
        }

        private void Update()
        {
            RotateCharacter();
        }

        private void RotateCharacter()
        {
            Vector3 mousePosition = Input.mousePosition;

            Vector3 worldMousePosition = _camera.ScreenToWorldPoint(mousePosition);

            _faceDirection = worldMousePosition - transform.position;

            if (_faceDirection.x < 0)
            {
                transform.rotation = Quaternion.Euler(0, 180,0);
            }
            else
            {
                transform.rotation = Quaternion.Euler(0, 0,0);
            }
        }

        private void FixedUpdate()
        {
            Vector2 velocity = new Vector2(
                Input.GetAxisRaw(Horizontal),
                Input.GetAxisRaw(Vertical));

            bool isRunning = velocity.magnitude > 0;
            _animator.SetBool(Run, isRunning);

            if ((_faceDirection.x < 0 && velocity.x > 0) ||
                (_faceDirection.x > 0 && velocity.x < 0) && isRunning)
            {
                _animator.SetFloat(RunMultiplier, -_defaultSpeed);
            }
            else
            {
                _animator.SetFloat(RunMultiplier, _defaultSpeed);
            }

            _body2D.velocity = velocity.normalized * _speed;
        }
    }
}