Code refactor, added coins chests, key chest and door

Assets/Scripts/BoxesController.cs

@@ -1,14 +0,0 @@
-using System.Collections;
-using System.Collections.Generic;
-using UnityEngine;
-
-public class BoxesController : MonoBehaviour
-{
-    private void OnTriggerEnter2D(Collider2D collision)
-    {
-        if (collision.tag == "Player")
-        { 
-            Destroy(gameObject);
-        }
-    }
-}

Assets/Scripts/Chest.cs

@@ -0,0 +1,16 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class Chest : MonoBehaviour
+{
+    private void OnTriggerEnter2D(Collider2D collider)
+    {
+        var player=collider.GetComponent<Player>();
+        if (player != null)
+        {
+            player.AddCoin();
+            Destroy(gameObject);
+        }
+    }
+}

Assets/Scripts/Door.cs

@@ -0,0 +1,13 @@
+using Assets.Scripts;
+using UnityEngine;
+
+public class Door : MonoBehaviour,IDoor
+{
+    public void OpenDoor()
+    {
+        //PlayOpenAnimation
+
+        //Disable box collider
+        gameObject.GetComponent<BoxCollider2D>().enabled=false;
+    }
+}

Assets/Scripts/DoorController.cs

@@ -1,15 +0,0 @@
-using System.Collections;
-using System.Collections.Generic;
-using UnityEngine;
-
-public class DoorController : MonoBehaviour
-{
-    private void OnTriggerEnter2D(Collider2D collision)
-    {
-        if (collision.tag == "Player")
-        {
-           //if player have key, door will open
-           //else player can't pass
-        }
-    }
-}

Assets/Scripts/DoorInteract.cs

@@ -0,0 +1,25 @@
+using Assets.Scripts;
+using UnityEngine;
+
+public class DoorInteract : MonoBehaviour
+{
+    [SerializeField] private GameObject _doorGameObject;
+    private IDoor _door;
+
+    private void Awake()
+    {
+        _door =_doorGameObject.GetComponent<IDoor>();
+    }
+
+    private void OnTriggerEnter2D(Collider2D collider)
+    {
+        var player = collider.GetComponent<Player>();
+        if (player!=null)
+        {
+            if (player.IsHasKey())
+            {
+                _door.OpenDoor();
+            }
+        }
+    }
+}

Assets/Scripts/DoorInteract.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: c43502b5415adc044b631292348c83e8
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/IDoor.cs

@@ -3,6 +3,5 @@
     public interface IDoor
     {
         void OpenDoor();
-        void ToggleDoor();
     }
 }

Assets/Scripts/KeyChest.cs

@@ -0,0 +1,14 @@
+using UnityEngine;
+
+public class KeyChest : MonoBehaviour
+{
+    private void OnTriggerEnter2D(Collider2D collider)
+    {
+        var player = collider.GetComponent<Player>();
+        if (player != null)
+        {
+            player.SetKey();
+            Destroy(gameObject);
+        }
+    }
+}

Assets/Scripts/KeyChest.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: cf81d521c74041643b3e8f0569c55a0f
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/Player.cs

@@ -1,6 +1,7 @@
+using System;
 using UnityEngine;
 
-public class PlayerController : MonoBehaviour
+public class Player : MonoBehaviour
 {
     [SerializeField]
     private Animator animator;
@@ -17,17 +18,41 @@ public class PlayerController : MonoBehaviour
     private BoxCollider2D _boxCollider;
     private bool _isFall;
     private bool _facingRight = true;
-    private bool _haveKey = false;
 
+    private int _totalCoins = 0;
+    private bool _hasKey = false;
 
-    void Start()
+    private void Start()
     {
         _body = GetComponent<Rigidbody2D>();
         _boxCollider = GetComponent<BoxCollider2D>();
     }
-    void Update()
+
+    public void AddCoin()
+    {
+        _totalCoins++;
+        print($"player have {_totalCoins} coins");
+    }
+
+    public void SetKey()
+    {
+        print($"player have key");
+        _hasKey =true;
+    }
+
+    public void RemoveKey()
+    {
+        _hasKey = false;
+    }
+
+    public bool IsHasKey()
+    {
+        return _hasKey;
+    }
+
+
+    private void Update()
     {
-        float inputHorizontal = 0;
         float inputVertical = 0;
 
         var groundCheck = Physics2D.BoxCast(_boxCollider.bounds.center, _boxCollider.bounds.size, 0f, Vector2.down, .1f, groundLayer);
@@ -35,7 +60,7 @@ public class PlayerController : MonoBehaviour
         if (groundCheck || _isOnLadder)
         {
             _isFall = false;
-            inputHorizontal = Input.GetAxisRaw("Horizontal");
+            float inputHorizontal = Input.GetAxisRaw("Horizontal");
             if (inputHorizontal > 0 && !_facingRight)
             {
                 FlipCharacter();
@@ -77,6 +102,8 @@ public class PlayerController : MonoBehaviour
         return Physics2D.BoxCast(_boxCollider.bounds.center, _boxCollider.bounds.size, 0f, direction, .1f, ladderLayer);
     }
 
+    
+
     private void FixedUpdate()
     {
         if (_isOnLadder)
@@ -108,12 +135,5 @@ public class PlayerController : MonoBehaviour
         _facingRight = !_facingRight;
     }
 
-    private void OnTriggerEnter2D(Collider2D collision)
-    {
-        var door = collision.GetComponent<DoorController>();
-        if (door != null)
-        {
-            door.OpenDoor();
-        }
-    }
+   
 }