Some things

Assets/Scripts/Level 3/Bullet3.cs

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+using UnityEngine;
+
+namespace Level3 {
+    public class Bullet3 : MonoBehaviour {
+        [SerializeField] float speed;
+
+        public void AddForce(int direction) {
+            Rigidbody2D rb = GetComponent<Rigidbody2D>();
+            rb.velocity = Vector2.right * direction * speed;
+        }
+
+        void OnCollisionEnter2D(Collision2D other) {
+            Destroy(gameObject);
+        }
+    }
+}

Assets/Scripts/Level 3/Bullet3.cs.meta

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Assets/Scripts/Level 3/Enemy3.cs

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+using UnityEngine;
+
+namespace Level3 {
+    public class Enemy3 : MonoBehaviour {
+        [SerializeField] float speed;
+
+        [SerializeField] LayerMask groundLayer;
+
+        [SerializeField] Transform sprite;
+
+        [Header("Flipping Pivots")] 
+        [SerializeField] Transform flippingPivotLeft;
+        [SerializeField] Transform flippingPivotRight;
+
+        int _facingDirection = 1;
+        Rigidbody2D _rb;
+    
+        // Start is called before the first frame update
+        void Awake() {
+            _rb = GetComponent<Rigidbody2D>();
+        }
+
+        // Update is called once per frame
+        void FixedUpdate() {
+            if (_facingDirection > 0) {
+                if (Physics2D.OverlapBox(flippingPivotRight.position, flippingPivotRight.localScale, 0, groundLayer)) {
+                    _facingDirection = -1;
+                    sprite.localScale = new Vector3(-1, 1, 1);
+                }
+            }else {
+                if (Physics2D.OverlapBox(flippingPivotLeft.position, flippingPivotLeft.localScale, 0, groundLayer)) {
+                    _facingDirection = 1;
+                    sprite.localScale = Vector3.one;
+                }
+            }
+            _rb.velocity = new Vector2(speed * _facingDirection, _rb.velocity.y);
+        }
+
+        void OnDrawGizmos() {
+            if(!flippingPivotLeft || !flippingPivotRight) return;
+
+            Gizmos.color = Color.red;
+        
+            Gizmos.DrawWireCube(flippingPivotLeft.position, flippingPivotLeft.localScale);
+            Gizmos.DrawWireCube(flippingPivotRight.position, flippingPivotRight.localScale);
+        }
+    }
+}

Assets/Scripts/Level 3/Enemy3.cs.meta

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Assets/Scripts/Level 3/EnemyWeakPoint3.cs

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+using UnityEngine;
+
+namespace Level3 {
+	public class EnemyWeakPoint3 : MonoBehaviour {
+
+		Enemy3 _enemy;
+	
+		void Awake() {
+			_enemy = GetComponentInParent<Enemy3>();
+		}
+
+		void OnTriggerEnter2D(Collider2D other) {
+			if (!other.CompareTag("Player")) return;
+			PlayerMovement3 player = other.GetComponent<PlayerMovement3>();
+
+			player.Rb.velocity = new Vector2(player.Rb.velocity.x, player.deathForce);
+			player.Animator.SetTrigger(PlayerMovement3.Jump1);
+			Destroy(_enemy.gameObject);
+		}
+	}
+}

Assets/Scripts/Level 3/EnemyWeakPoint3.cs.meta

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+timeCreated: 1691603524

Assets/Scripts/Level 3/PlayerMovement3.cs

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+using UnityEngine;
+using UnityEngine.InputSystem;
+
+namespace Level3 {
+    public class PlayerMovement3 : PlayerStats {
+    
+        [Header("Shooting")]
+        [SerializeField] Bullet3 bullet;
+        [SerializeField] Transform shootingPos;
+    
+        [Header("Physics")] 
+        [SerializeField] LayerMask groundMask;
+        [SerializeField] Vector2 feetSize;
+    
+        float _horizontalInput;
+        float _xVelocity;
+        float _accelerationVelocity;
+        bool _grounded;
+
+        int _facingDirection = 1;
+
+        PlayerInput _playerInput;
+
+        [Header("Animations")] 
+        [SerializeField] Animator animator;
+        public Animator Animator => animator;
+
+        public static readonly int Jump1 = Animator.StringToHash("Jump");
+        static readonly int XVelocity = Animator.StringToHash("xVelocity");
+        static readonly int YVelocity = Animator.StringToHash("yVelocity");
+        static readonly int Grounded = Animator.StringToHash("Grounded");
+
+        void Awake() {
+            _playerInput = new PlayerInput();
+        
+            _playerInput.Gameplay.Horizontal.started += HorizontalHandler;
+            _playerInput.Gameplay.Horizontal.performed += HorizontalHandler;
+            _playerInput.Gameplay.Horizontal.canceled += HorizontalHandler;
+
+            _playerInput.Gameplay.Jump.started += Jump;
+            _playerInput.Gameplay.Jump.canceled += Jump;
+        
+            _playerInput.Gameplay.Fire.performed += Fire;
+        }
+
+        void Jump(InputAction.CallbackContext obj) {
+            if (_grounded) {
+                if(!obj.started) return;
+                Rb.velocity = new Vector2(Rb.velocity.x, jumpForce);
+                animator.SetTrigger(Jump1);
+            }else if (Rb.velocity.y > 0f) {
+                if(!obj.canceled) return;
+                Rb.velocity = new Vector2(Rb.velocity.x, Rb.velocity.y * jumpCancellationMultiplier);
+            }
+        }
+
+        void Fire(InputAction.CallbackContext obj) {
+            Bullet3 bullet3 = Instantiate(bullet, shootingPos.position, Quaternion.identity);
+            bullet3.AddForce(_facingDirection);
+        }
+    
+        void HorizontalHandler(InputAction.CallbackContext obj) {
+            _horizontalInput = obj.ReadValue<float>();
+            _facingDirection = _horizontalInput > 0 ? 1 : _horizontalInput < 0 ? -1 : _facingDirection;
+            transform.localScale = new Vector3(_facingDirection, 1, 1);
+        }
+    
+        void OnEnable() {
+            _playerInput.Enable();
+        }
+
+        void OnDisable() {
+            _playerInput.Disable();
+        }
+
+        // Update is called once per frame
+        void Update() {
+            animator.SetFloat(XVelocity, Mathf.Abs(_horizontalInput * speed));
+            animator.SetFloat(YVelocity, Rb.velocity.y);
+            animator.SetBool(Grounded, _grounded);
+        }
+
+        void FixedUpdate() {
+            _grounded = Physics2D.OverlapBox(transform.position, feetSize, 0, groundMask);
+
+            _xVelocity = Rb.velocity.x;
+            _xVelocity = Mathf.SmoothDamp(_xVelocity, _horizontalInput * speed, ref _accelerationVelocity,
+                acceleration);;
+            Rb.velocity = new Vector2(_xVelocity, Rb.velocity.y);
+        }
+
+        void OnDrawGizmos() {
+            Gizmos.color = Color.red;
+            Gizmos.DrawWireCube(transform.position, feetSize);
+        }
+    }
+}

Assets/Scripts/Level 3/PlayerMovement3.cs.meta

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