Unlockable Levels and Added empty 7 levels

Assets/Scripts/Level/Level.cs

@@ -5,7 +5,7 @@ namespace Level
     public class Level : MonoBehaviour
     {
         public const string ResourcesDirectory = "Levels/";
-        public string LevelName { get; private set; } = "";
+        public int LevelNumber { get; private set; } = 0;
 
         public Transform StartingPoint { get; private set; } = null;
 
@@ -13,11 +13,10 @@ namespace Level
         private GameObject instance = null;
         private bool needsRestart = true;
 
-        public void SetLevel(string levelName)
+        public void SetLevel(int levelNumber)
         {
-            LevelName = levelName;
-
-            prefab = Resources.Load<GameObject>($"{ ResourcesDirectory }{ levelName }");
+            LevelNumber = levelNumber;
+            prefab = Resources.Load<GameObject>($"{ ResourcesDirectory }{ levelNumber }");
             Disable();
         }
 
@@ -41,9 +40,9 @@ namespace Level
             needsRestart = false;
         }
 
-        public void EndLevel() => PlayerPrefs.SetInt(LevelName, 1);
+        public void EndLevel() => PlayerPrefs.SetInt(LevelNumber.ToString(), 1);
 
         [ContextMenu("Restart")]
-        public void Restart() => LevelManager.Instance.SwitchToLevel(LevelName);
+        public void Restart() => LevelManager.Instance.SwitchToLevel(LevelNumber);
     }
 }

Assets/Scripts/Level/LevelEnd.cs

@@ -7,6 +7,12 @@ namespace Level
         private Level level = null;
         private void Awake() => level = GetComponentInParent<Level>();
 
-        public void EndLevel() => level.EndLevel();
+        public void EndLevel()
+        {
+            level.EndLevel();
+            Debug.Log(level.LevelNumber);
+
+            LevelManager.Instance.SwitchToLevel(level.LevelNumber + 1);
+        }
     }
 }

Assets/Scripts/Level/LevelManager.cs

@@ -23,8 +23,8 @@ namespace Level
             }
         }
 
-        private Dictionary<string, Level> _levels = null;
-        public Dictionary<string, Level> Levels
+        private Dictionary<int, Level> _levels = null;
+        public Dictionary<int, Level> Levels
         {
             get
             {
@@ -52,7 +52,7 @@ namespace Level
         {
             GameObject[] levelPrefabs = Resources.LoadAll<GameObject>("Levels/");
             Transform levelContainer = new GameObject("Levels").transform;
-            _levels = new Dictionary<string, Level>(levelPrefabs.Length);
+            _levels = new Dictionary<int, Level>(levelPrefabs.Length);
 
             System.Array.Sort(levelPrefabs, (x, y) => Int32.Parse(x.name).CompareTo(Int32.Parse(y.name)));
 
@@ -63,8 +63,8 @@ namespace Level
                 levelInstance = new GameObject(levelPrefab.gameObject.name);
                 levelInstance.transform.SetParent(levelContainer);
                 level = levelInstance.AddComponent<Level>();
-                level.SetLevel(levelPrefab.name);
-                _levels.Add(levelPrefab.gameObject.name, level);
+                level.SetLevel(System.Int32.Parse(levelPrefab.name));
+                _levels.Add(System.Int32.Parse(levelPrefab.gameObject.name), level);
             }
 
             Player = GameObject.FindWithTag("Player");
@@ -73,11 +73,11 @@ namespace Level
             Player.SetActive(false);
         }
 
-        public void SwitchToLevel(string levelName)
+        public void SwitchToLevel(int levelNumber)
         {
             DisableAllLevels();
 
-            currentLevel = Levels[levelName];
+            currentLevel = Levels[levelNumber];
             currentLevel.Enable();
 
             Player.SetActive(true);
@@ -93,5 +93,18 @@ namespace Level
             foreach (Level level in Levels.Values)
                 level.Disable();
         }
+
+        public bool IsLevelUnlocked(int levelNumber)
+        {
+            levelNumber -= 1;
+
+            if (levelNumber == 0)
+                return true;
+
+            return PlayerPrefs.GetInt(levelNumber.ToString(), 0) != 0;
+        }
+
+        [ContextMenu("Lock All Levels")]
+        public void LockAllLevels() => PlayerPrefs.DeleteAll();
     }
 }

Assets/Scripts/UI/LevelButton.cs

@@ -7,10 +7,15 @@ namespace UI
     public class LevelButton : MonoBehaviour
     {
         private TMP_Text text = null;
+        public int LevelNumber { get; private set; } = 0;
 
         private void Awake() => text = GetComponentInChildren<TMP_Text>();
 
-        public void SetLevel(string levelName) => text.text = levelName;
-        public void StartLevel() => LevelManager.Instance.SwitchToLevel(text.text);
+        public void SetLevel(string levelName)
+        {
+            text.text = levelName;
+            LevelNumber = System.Int32.Parse(levelName);
+        }
+        public void StartLevel() => LevelManager.Instance.SwitchToLevel(LevelNumber);
     }
 }

Assets/Scripts/UI/LevelSelectionMenu.cs

@@ -1,6 +1,8 @@
 using System;
+using System.Collections.Generic;
 using Level;
 using UnityEngine;
+using UnityEngine.UI;
 
 namespace UI
 {
@@ -8,13 +10,15 @@ namespace UI
     {
         [SerializeField] private Vector2Int maxGridSize = Vector2Int.one;
         private GameObject levelButtonPrefab = null;
+        private List<GameObject> instances = null;
 
         private void Awake()
         {
             levelButtonPrefab = Resources.Load<GameObject>("UI/Level Button Variant");
+            instances = new List<GameObject>();
         }
 
-        private void Start()
+        private void OnEnable()
         {
             LevelButton instance = null;
 
@@ -48,8 +52,17 @@ namespace UI
                 instancePosition.x = columnOffset + columnIndex * instanceRectTransform.rect.width * 1.5f;
                 instanceRectTransform.localPosition = instancePosition;
 
+                instance.GetComponent<Button>().interactable = LevelManager.Instance.IsLevelUnlocked(instance.LevelNumber);
+
+                instances.Add(instance.gameObject);
                 i++;
             }
         }
+
+        private void OnDisable()
+        {
+            foreach (GameObject gameObject in instances)
+                Destroy(gameObject.gameObject);
+        }
     }
 }