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-  m_Origin: {x: 0, y: 0, z: 0}
-  m_Size: {x: 0, y: 0, z: 1}
-  m_TileAnchor: {x: 0.5, y: 0.5, z: 0}
-  m_TileOrientation: 0
-  m_TileOrientationMatrix:
-    e00: 1
-    e01: 0
-    e02: 0
-    e03: 0
-    e10: 0
-    e11: 1
-    e12: 0
-    e13: 0
-    e20: 0
-    e21: 0
-    e22: 1
-    e23: 0
-    e30: 0
-    e31: 0
-    e32: 0
-    e33: 1
+  _attack_interval: 2
 --- !u!50 &-1491803373025033585
 Rigidbody2D:
   serializedVersion: 4
diff --git a/Assets/Prefabs/baseProjectile.prefab b/Assets/Prefabs/baseProjectile.prefab
index cbab2f8..bba972b 100644
--- a/Assets/Prefabs/baseProjectile.prefab
+++ b/Assets/Prefabs/baseProjectile.prefab
@@ -9,7 +9,6 @@ GameObject:
   serializedVersion: 6
   m_Component:
   - component: {fileID: 6962989255644195631}
-  - component: {fileID: 6072713849781841816}
   - component: {fileID: -1491803373025033585}
   - component: {fileID: 8133954670424616578}
   m_Layer: 0
@@ -36,44 +35,6 @@ Transform:
   m_Father: {fileID: 0}
   m_RootOrder: 0
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
---- !u!1839735485 &6072713849781841816
-Tilemap:
-  m_ObjectHideFlags: 0
-  m_CorrespondingSourceObject: {fileID: 0}
-  m_PrefabInstance: {fileID: 0}
-  m_PrefabAsset: {fileID: 0}
-  m_GameObject: {fileID: 6962989255644195630}
-  m_Enabled: 0
-  m_Tiles: {}
-  m_AnimatedTiles: {}
-  m_TileAssetArray: []
-  m_TileSpriteArray: []
-  m_TileMatrixArray: []
-  m_TileColorArray: []
-  m_TileObjectToInstantiateArray: []
-  m_AnimationFrameRate: 1
-  m_Color: {r: 1, g: 1, b: 1, a: 1}
-  m_Origin: {x: 0, y: 0, z: 0}
-  m_Size: {x: 0, y: 0, z: 1}
-  m_TileAnchor: {x: 0.5, y: 0.5, z: 0}
-  m_TileOrientation: 0
-  m_TileOrientationMatrix:
-    e00: 1
-    e01: 0
-    e02: 0
-    e03: 0
-    e10: 0
-    e11: 1
-    e12: 0
-    e13: 0
-    e20: 0
-    e21: 0
-    e22: 1
-    e23: 0
-    e30: 0
-    e31: 0
-    e32: 0
-    e33: 1
 --- !u!50 &-1491803373025033585
 Rigidbody2D:
   serializedVersion: 4
diff --git a/Assets/Scripts/Ally/Ally.cs b/Assets/Scripts/Ally/Ally.cs
index 4615d32..8145a0d 100644
--- a/Assets/Scripts/Ally/Ally.cs
+++ b/Assets/Scripts/Ally/Ally.cs
@@ -4,31 +4,38 @@ using UnityEngine;
 
 public class Ally : Entity
 {
+    public override float DamageMultiplier => GlobalConfig.Instance.Current.allyDamageMultiplier;
+    public override float AttackSpeedMultiplier => GlobalConfig.Instance.Current.allyAttackSpeedMultiplier;
+    public override float HpMultiplier => GlobalConfig.Instance.Current.allyLifeMultiplier;
+    public override Vector2 RangeMultiplier => GlobalConfig.Instance.Current.allyRangeMultiplier;
+    public override float SpeedMultiplier => GlobalConfig.Instance.Current.allySpeedMultiplier;
+
     public override void Start()
     {
         base.Start();
     }
 
-    void Update() 
+    public override void Update() 
     {
-
+        base.Update();
         if(IsEnemyDetected) {
             AttackEnemy();
         }
 
     }
 
-    void AttackEnemy() 
+    void AttackEnemy()
     {
         //Attack Cooldown
-            if(AttackSpeed < AttackSpeedWait) {
+        if (AttackSpeedWait > AttackInterval)
+        {
 
-                Animation.PlayAttackAnim();
+            Animation.PlayAttackAnim();
 
-                AttackSpeedWait = 0f;
-            }
+            AttackSpeedWait = 0f;
+        }
 
-            AttackSpeedWait += Time.deltaTime;
+        AttackSpeedWait += Time.deltaTime;
     }
 
 }
diff --git a/Assets/Scripts/Ally/Archer.cs b/Assets/Scripts/Ally/Archer.cs
index 8f4f4e9..c63c3a1 100644
--- a/Assets/Scripts/Ally/Archer.cs
+++ b/Assets/Scripts/Ally/Archer.cs
@@ -10,9 +10,9 @@ public class Archer : Ally
         base.Start();
     }
 
-    void Update() 
+    public override void Update() 
     {
-
+        base.Update();
         if(IsEnemyDetected) {
             AttackEnemy();
         }
@@ -23,7 +23,7 @@ public class Archer : Ally
     {
 
         //Attack Cooldown
-            if(AttackSpeed < AttackSpeedWait) {
+            if(AttackInterval < AttackSpeedWait) {
 
                 Animation.PlayAttackAnim();
 
diff --git a/Assets/Scripts/Ally/Harvester.cs b/Assets/Scripts/Ally/Harvester.cs
index 2e117da..f90afac 100644
--- a/Assets/Scripts/Ally/Harvester.cs
+++ b/Assets/Scripts/Ally/Harvester.cs
@@ -2,11 +2,22 @@ using UnityEngine;
 using System.Collections.Generic;
 using static Enum;
 
-public class Harvester : Entity 
+public class Harvester : Entity
 {
-    [SerializeField][Tooltip("helps choose the right skin for the harvester depending on resource")]
+    [SerializeField] [Tooltip("helps choose the right skin for the harvester depending on resource")]
     private List<HarvesterResourcePair> _harvesterResourcePairs;
     protected ResourceChoice ResourceChoice => _resourceChoice;
+
+    public override Vector2 RangeMultiplier { get; }
+
+    public override float HpMultiplier { get; }
+
+    public override float SpeedMultiplier { get; }
+
+    public override float DamageMultiplier { get; }
+
+    public override float AttackSpeedMultiplier { get; }
+
     [SerializeField]
     private ResourceChoice _resourceChoice;
     public override sealed void Start()
diff --git a/Assets/Scripts/AnimationEntity.cs b/Assets/Scripts/AnimationEntity.cs
index b3b071a..b8c0f77 100644
--- a/Assets/Scripts/AnimationEntity.cs
+++ b/Assets/Scripts/AnimationEntity.cs
@@ -4,39 +4,63 @@ using UnityEngine;
 
 public class AnimationEntity : MonoBehaviour
 {
+    enum EntityAnimationState 
+    {
+        Idle = 0,
+        Walking = 1,
+        Attacking = 2,
+        Dying = 3
+    }
+    private EntityAnimationState entityState;
 
     private Animator _animatorEntity;
     private bool _doSomething = false;
     private bool _isDead = false;
     private bool _isWalking = false;
-
+    
     void Start() 
     {
+        AttackSpeedMultiplier = 10;
+        SpeedMultiplier = 10;
         _animatorEntity = GetComponentInChildren<Animator>();
     }
 
     void Update() 
-    {
-
+    { 
         if (_doSomething && _animatorEntity.GetCurrentAnimatorStateInfo(0).normalizedTime >= 1f)
         {
             PlayIdleAnim();
             _doSomething = false;
             _isWalking = false;
         }
+        _animatorEntity.speed = GetAnimatorSpeed();
+    }
+
+    private float GetAnimatorSpeed()
+    {
+        return entityState switch
+        {
+            EntityAnimationState.Attacking => AttackSpeedMultiplier,
+            EntityAnimationState.Walking => SpeedMultiplier,
+            _ => 1,
+        };
     }
 
     public void PlayIdleAnim() 
     {
         if(!_isDead) {
+            _animatorEntity.speed = 1;
             _animatorEntity.Play("idle", 0, 0f);
+            entityState = EntityAnimationState.Idle;
         }
     }
 
     public void PlayWalkAnim() 
     {
         if(!_isDead) {
+            _animatorEntity.speed = SpeedMultiplier;
             _animatorEntity.Play("walk", 0, 0f);
+            entityState = EntityAnimationState.Walking;
             _isWalking = true;
         }
     }
@@ -44,14 +68,18 @@ public class AnimationEntity : MonoBehaviour
     public void PlayAttackAnim() 
     {
         if(!_isDead) {
+            _animatorEntity.speed = AttackSpeedMultiplier;
             _animatorEntity.Play("attack", 0, 0f);
+            entityState = EntityAnimationState.Attacking;
             _doSomething = true;
         }
     }
 
     public void PlayDieAnim() 
     {
+        _animatorEntity.speed = 1;
         _animatorEntity.Play("die", 0, 0f);
+        entityState = EntityAnimationState.Dying;
         _doSomething = true;
         _isDead = true;
     }
@@ -62,5 +90,12 @@ public class AnimationEntity : MonoBehaviour
         get { return _isWalking; }
         set { _isWalking = value; }
     }
-
+    public float AttackSpeedMultiplier
+    {
+        get; set;
+    }
+    public float SpeedMultiplier
+    {
+        get; set;
+    }
 }
diff --git a/Assets/Scripts/Detection.cs b/Assets/Scripts/Detection.cs
index dda1736..045534b 100644
--- a/Assets/Scripts/Detection.cs
+++ b/Assets/Scripts/Detection.cs
@@ -4,22 +4,48 @@ using UnityEngine;
 
 public class Detection : MonoBehaviour
 {
+    private Vector2 detectionRange;
+    private BoxCollider2D _collider;
     public Rect DetectionRectangle
     {
         get
         {
-            var collider = GetComponent<Collider2D>();
-            var bounds = collider.bounds;
+            if (!_collider) _collider = GetComponent<BoxCollider2D>();
+            var bounds = _collider.bounds;
             return new Rect(bounds.min - transform.position, bounds.size);
         }
     }
     [SerializeField]
     private Entity _entityLinked;
+    protected virtual void Start()
+    {
+        _collider = GetComponent<BoxCollider2D>();
+        detectionRange = _collider.size;
+    }
+    void ResizeCollider()
+    {
+        if (!EntityLinked) return;
+        var multiplier = EntityLinked.RangeMultiplier;
+        var size = _collider.size;
+        size.x = detectionRange.x * multiplier.x;
+        size.y = detectionRange.y * multiplier.y;
+        _collider.size = size;
 
+        var offset = _collider.offset;
+        if (offset == Vector2.zero) return;
+
+        offset.x = Mathf.Sign(offset.x) * size.x / 2;
+        _collider.offset = offset;
+    }
     //If it's a projectile damage > 0
     private int _projectileDamage = 0;
     private float _distanceMin = 100f;
 
+    protected virtual void Update()
+    {
+        ResizeCollider();
+    }
+
     void OnTriggerEnter2D(Collider2D other)
     {
         //Projectiles detection + damage deal
@@ -82,6 +108,7 @@ public class Detection : MonoBehaviour
         
     }
 
+
     //Getter and Setter
     public Entity EntityLinked
     {
diff --git a/Assets/Scripts/Entity.cs b/Assets/Scripts/Entity.cs
index 598493b..5fc8a74 100644
--- a/Assets/Scripts/Entity.cs
+++ b/Assets/Scripts/Entity.cs
@@ -1,9 +1,8 @@
 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
-using static Extensions;
 
-public class Entity : LevelObject
+public abstract class Entity : LevelObject
 {
     //Attribut
     [SerializeField]
@@ -11,9 +10,9 @@ public class Entity : LevelObject
     [SerializeField]
     private float _speed;
     [SerializeField]
-    private int _attack_damage;
+    private int _attack_damage = 2;
     [SerializeField]
-    private float _attack_speed;
+    private float _attack_interval = 2;
     private float _attack_speed_wait = 0f;
     private AnimationEntity _animation;
     private Shader _shaderGUItext;
@@ -30,7 +29,11 @@ public class Entity : LevelObject
         _spriteRenderers = GetComponentsInChildren<SpriteRenderer>();
         Animation = gameObject.AddComponent<AnimationEntity>();
     }
-
+    public virtual void Update()
+    {
+        Animation.AttackSpeedMultiplier = AttackSpeedMultiplier;
+        Animation.SpeedMultiplier = SpeedMultiplier;
+    }
     //Start the animation of death and the fading of the entity
     public void Death() 
     {
@@ -89,36 +92,26 @@ public class Entity : LevelObject
     }
 
     //GETTERS AND SETTERS
-    
-    public int Hp
-    {
-        get { return _hp; }
-        set { _hp = value; }
-    }
 
-    public float Speed
-    {
-        get { return _speed; }
-        set { _speed = value; }
-    }
+    public abstract Vector2 RangeMultiplier { get; }
+    public abstract float HpMultiplier { get; }
+    public abstract float SpeedMultiplier { get; }
+    public abstract float DamageMultiplier { get; }
+    public abstract float AttackSpeedMultiplier { get; }
 
-    public int AttackDamage
-    {
-        get { return _attack_damage; }
-        set { _attack_damage = value; }
-    }
+    public int Hp => (int)(_hp * HpMultiplier);
 
-    public float AttackSpeed
-    {
-        get { return _attack_speed; }
-        set { _attack_speed = value; }
-    }
+    public float Speed => _speed * SpeedMultiplier;
+
+    public int AttackDamage => (int)(_attack_damage * DamageMultiplier);
+
+    public float AttackInterval => _attack_interval / AttackSpeedMultiplier;
 
     public float AttackSpeedWait
-{
-    get { return _attack_speed_wait; }
-    set { _attack_speed_wait = value; }
-}
+    {
+        get { return _attack_speed_wait; }
+        set { _attack_speed_wait = value; }
+    }
 
     public bool IsEnemyDetected
     {
@@ -145,19 +138,17 @@ public class Entity : LevelObject
             && base.Equals(otherEntity)
             && otherEntity._hp == _hp
             && otherEntity._speed == _speed
-            && otherEntity._attack_speed == _attack_speed
+            && otherEntity._attack_interval == _attack_interval
             && otherEntity._attack_damage == _attack_damage;
     }
-
     public override Dictionary<string, object> ToDictionary()
     {
         var dict = base.ToDictionary();
 
         dict[nameof(_hp)] = _hp;
         dict[nameof(_speed)] = _speed;
-        dict[nameof(_attack_speed)] = _attack_speed;
+        dict[nameof(_attack_interval)] = _attack_interval;
         dict[nameof(_attack_damage)] = _attack_damage;
-        dict[nameof(_attack_speed_wait)] = _attack_speed_wait;
 
         return dict;
     }
@@ -167,9 +158,8 @@ public class Entity : LevelObject
 
         _hp = dict[nameof(_hp)].ToInt();
         _speed = dict[nameof(_speed)].ToFloat();
-        _attack_speed = dict[nameof(_attack_speed)].ToFloat();
+        _attack_interval = dict[nameof(_attack_interval)].ToFloat();
         _attack_damage = dict[nameof(_attack_damage)].ToInt();
-        _attack_speed_wait = dict[nameof(_attack_speed_wait)].ToFloat();
     }
     #endregion
 }
diff --git a/Assets/Scripts/General/Extensions.cs b/Assets/Scripts/General/Extensions.cs
index c938c49..ad694e2 100644
--- a/Assets/Scripts/General/Extensions.cs
+++ b/Assets/Scripts/General/Extensions.cs
@@ -4,6 +4,7 @@ using BindingFlags = System.Reflection.BindingFlags;
 using UnityEngine;
 using System.Collections;
 using GatherAndDefend.LevelEditor;
+using System.Linq;
 
 public static class Extensions
 {
@@ -96,4 +97,22 @@ public static class Extensions
     {
         return Vector2.Distance(vect, tilePosition) < 0.5f;
     }
+
+    public static T Minimum<T>(this IEnumerable<T> list, Func<T, float> func)
+    {
+        if (list.Count() < 1) throw new Exception("in " + nameof(Minimum) + " : Cannot find minimum of empty list : " + nameof(list));
+        T minT = list.ElementAt(0);
+        float minVal = func(minT);
+        
+        foreach (var obj in list)
+        {
+            var newVal = func(obj);
+            if (minVal > newVal)
+            {
+                minT = obj;
+                minVal = newVal;
+            }
+        }
+        return minT;
+    }
 }
\ No newline at end of file
diff --git a/Assets/Scripts/General/GlobalConfig.cs b/Assets/Scripts/General/GlobalConfig.cs
new file mode 100644
index 0000000..a954bd2
--- /dev/null
+++ b/Assets/Scripts/General/GlobalConfig.cs
@@ -0,0 +1,18 @@
+using UnityEngine;
+
+public class GlobalConfig : SingletonBehaviour<GlobalConfig>
+{
+    [SerializeField]
+    private GlobalConfigFile _current;
+    public GlobalConfigFile Current
+    {
+        get
+        {
+            if (!_current)
+            {
+                _current = ScriptableObject.CreateInstance<GlobalConfigFile>();
+            }
+            return _current;
+        }
+    }
+}
diff --git a/Assets/Scripts/General/GlobalConfig.cs.meta b/Assets/Scripts/General/GlobalConfig.cs.meta
new file mode 100644
index 0000000..43d6acb
--- /dev/null
+++ b/Assets/Scripts/General/GlobalConfig.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: c8f878516c4a3324aa1a9672f8b336c9
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Assets/Scripts/General/GlobalConfigFile.cs b/Assets/Scripts/General/GlobalConfigFile.cs
new file mode 100644
index 0000000..3423538
--- /dev/null
+++ b/Assets/Scripts/General/GlobalConfigFile.cs
@@ -0,0 +1,33 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+[CreateAssetMenu(menuName = project_name + "/Global Config")]
+public class GlobalConfigFile : ScriptableObject
+{
+
+    public const string project_name = "Gather And Defend";
+
+    public float damageFlashIntensity = 1;
+    [Header("Enemies")]
+    public float enemySpeedMultiplier = 1;
+    public float enemyDamageMultiplier = 1;
+    public float enemyLifeMultiplier = 1;
+    public Vector2 enemyRangeMultiplier = Vector2.one;
+    public float enemyAttackSpeedMultiplier = 1;
+
+    [Header("Allies")]
+    public float allyDamageMultiplier = 1;
+    public float allyLifeMultiplier = 1;
+    public float allyAttackSpeedMultiplier = 1;
+    public float allySpeedMultiplier = 1;
+    public Vector2 allyRangeMultiplier = Vector2.one;
+    
+
+    [Header("resources")]
+    public float harvestDuration = 1;
+    public int harvestAmount = 1;
+    public bool useRandomHarvestDuration = false;
+    public int randomHarvestDurationMinimum = 0;
+    public int randomHarvestDurationMaximum = 0;
+}
diff --git a/Assets/Scripts/General/GlobalConfigFile.cs.meta b/Assets/Scripts/General/GlobalConfigFile.cs.meta
new file mode 100644
index 0000000..3acea83
--- /dev/null
+++ b/Assets/Scripts/General/GlobalConfigFile.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 32e788fd2a7bdaf4ab145b64231cb833
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Assets/Scripts/Opponent/Opponent.cs b/Assets/Scripts/Opponent/Opponent.cs
index 14a2451..b0d7b26 100644
--- a/Assets/Scripts/Opponent/Opponent.cs
+++ b/Assets/Scripts/Opponent/Opponent.cs
@@ -4,6 +4,11 @@ using UnityEngine;
 
 public class Opponent : Entity
 {
+    public override Vector2 RangeMultiplier => GlobalConfig.Instance.Current.enemyRangeMultiplier;
+    public override float DamageMultiplier => GlobalConfig.Instance.Current.enemyDamageMultiplier;
+    public override float AttackSpeedMultiplier => GlobalConfig.Instance.Current.enemyAttackSpeedMultiplier;
+    public override float HpMultiplier => GlobalConfig.Instance.Current.enemyLifeMultiplier;
+    public override float SpeedMultiplier => GlobalConfig.Instance.Current.enemySpeedMultiplier;
 
     private Vector2 _movementVector = Vector2.zero;
     private Rigidbody2D _rigidbody;
@@ -16,11 +21,15 @@ public class Opponent : Entity
         Animation = gameObject.AddComponent<AnimationEntity>();
     }
 
-    void Update() 
+    public override void Update() 
     {
-        if(IsEnemyDetected) {
+        base.Update();
+        if(IsEnemyDetected) 
+        {
             AttackEnemy();
-        }else {
+        }
+        else 
+        {
             _movementVector.x = -Time.deltaTime * Speed;
 
             transform.position += (Vector3)_movementVector;
@@ -36,7 +45,7 @@ public class Opponent : Entity
     void AttackEnemy() 
     {
         //Attack Cooldown
-        if(AttackSpeed < AttackSpeedWait) 
+        if(AttackInterval < AttackSpeedWait) 
         {
                 Animation.PlayAttackAnim();
 
diff --git a/Assets/Scripts/Resource/ResourceMaker.cs b/Assets/Scripts/Resource/ResourceMaker.cs
index b52a821..efe051a 100644
--- a/Assets/Scripts/Resource/ResourceMaker.cs
+++ b/Assets/Scripts/Resource/ResourceMaker.cs
@@ -5,8 +5,6 @@ using UnityEngine;
 /// </summary>
 public class ResourceMaker : MonoBehaviour
 {
-    [SerializeField] 
-    private int _resourceMakingAmount;
     [SerializeField] 
     private Enum.ResourceChoice _resourceChoice;
     private ResourceManager _resourceManagerInstance;
@@ -43,6 +41,7 @@ public class ResourceMaker : MonoBehaviour
 
         if (_isPlaying)
         {
+            var amount = GlobalConfig.Instance.Current.harvestAmount;
             _timePassed += Time.deltaTime;
             float duration = _timePassed / _desiredTime;
             duration = duration * duration * (3.0f - 2.0f * duration);
@@ -53,13 +52,13 @@ public class ResourceMaker : MonoBehaviour
                 switch (_resourceChoice)
                 {
                     case Enum.ResourceChoice.Rock:
-                        _resourceManagerInstance.RockAmount = _resourceMakingAmount;
+                        _resourceManagerInstance.RockAmount = amount;
                         break;
                     case Enum.ResourceChoice.Wood:
-                        _resourceManagerInstance.WoodAmount = _resourceMakingAmount;
+                        _resourceManagerInstance.WoodAmount = amount;
                         break;
                     case Enum.ResourceChoice.Food:
-                        _resourceManagerInstance.FoodAmount = _resourceMakingAmount;
+                        _resourceManagerInstance.FoodAmount = amount;
                         break;
                 }
                 Destroy(gameObject);
diff --git a/Assets/Scripts/Root.cs b/Assets/Scripts/Root.cs
index 91cfaf4..eb71304 100644
--- a/Assets/Scripts/Root.cs
+++ b/Assets/Scripts/Root.cs
@@ -13,7 +13,7 @@ public class Root : MonoBehaviour
     private Transform _projectileSpawn;
 
     void Attack() {
-        _entity.Enemy.Hit( _entity.AttackDamage);
+        _entity.Enemy.Hit(_entity.AttackDamage);
         if(_entity.Enemy.Hp <= 0) {
             _entity.Enemy.Death();
             _entity.IsEnemyDetected = false;
diff --git a/Assets/Scripts/Tiles/ResourceTile.cs b/Assets/Scripts/Tiles/ResourceTile.cs
index 0327ef5..cfd4e6a 100644
--- a/Assets/Scripts/Tiles/ResourceTile.cs
+++ b/Assets/Scripts/Tiles/ResourceTile.cs
@@ -12,47 +12,67 @@ public class ResourceTile : LevelTile
     public GameObject YieldPrefab => _yieldPrefab;
     private string YieldPrefabName => _yieldPrefab.name;
 
-    [SerializeField]
-    private float _yieldSpeed = 1; //resource per second
     [SerializeField]
     [Range(0.0f, 5.0f)]
     private float _randomPositionConfig = 0.5f;
     private float _yieldCounter = 0;
-    public bool Occupied { get; set; }
 
+    public override void LevelStart()
+    {
+        base.LevelStart();
+        ResetYieldDuration();
+    }
     public override void LevelUpdate()
     {
         //check if there is an harvester unit on top
         var hasFarmer = LevelManager.Instance.Get<Harvester>(x => x.Position.IsContainedIn(Position));
         if (!hasFarmer) return;
 
+        _yieldCounter -= Time.deltaTime;
+        if (_yieldCounter > 0) return;
 
-        _yieldCounter += Time.deltaTime * _yieldSpeed;
-        if (_yieldCounter < 1) return;
-        if(_yieldPrefab != null)
+        ResetYieldDuration();
+
+        if (_yieldPrefab != null)
         {
-            _yieldCounter = 0;
-            float rangeConfig = 0.5f + _randomPositionConfig;
-            Vector3 yieldPosition = new Vector3(Position.x + Random.Range(-rangeConfig, rangeConfig), Position.y, Position.z);
-            var yielded = Instantiate(_yieldPrefab, yieldPosition, Quaternion.identity);
-            yielded.transform.SetParent(LevelManager.Instance.LevelTransform);
+            YieldResource();
+        }
+    }
+    private void YieldResource()
+    {
+        float rangeConfig = 0.5f + _randomPositionConfig;
+        Vector3 yieldPosition = new Vector3(Position.x + Random.Range(-rangeConfig, rangeConfig), Position.y, Position.z);
+        var yielded = Instantiate(_yieldPrefab, yieldPosition, Quaternion.identity);
+        yielded.transform.SetParent(LevelManager.Instance.LevelTransform);
+    }
+    private void ResetYieldDuration() 
+    {
+        _yieldCounter = 0;
+        var config = GlobalConfig.Instance.Current;
+        if (!config) return;
+
+        if (config.useRandomHarvestDuration)
+        {
+            float min = config.randomHarvestDurationMinimum,
+                  max = config.randomHarvestDurationMaximum;
+            _yieldCounter = Random.Range(min, max);
+        }
+        else
+        {
+            _yieldCounter = config.harvestDuration;
         }
     }
     public override bool Equals(ILevelObject other)
     {
         return other is ResourceTile otherRes
             && base.Equals(otherRes)
-            && _yieldPrefab == otherRes._yieldPrefab
-            && _yieldSpeed == otherRes._yieldSpeed
-            && Occupied == otherRes.Occupied;
+            && _yieldPrefab == otherRes._yieldPrefab;
     }
     public override Dictionary<string, object> ToDictionary()
     {
         var dict = base.ToDictionary();
 
         dict[nameof(YieldPrefabName)] = YieldPrefabName;
-        dict[nameof(_yieldSpeed)] = _yieldSpeed;
-        dict[nameof(Occupied)] = Occupied;
         return dict;
     }
     public override void LoadDictionary(Dictionary<string, object> dict)
@@ -60,8 +80,5 @@ public class ResourceTile : LevelTile
         base.LoadDictionary(dict);
         var prefabName = dict[nameof(YieldPrefabName)].ToString();
         _yieldPrefab = Database.Instance.Prefabs[prefabName];
-        _yieldSpeed = dict[nameof(_yieldSpeed)].ToFloat();
-        _yieldCounter = dict[nameof(_yieldCounter)].ToFloat();
-        Occupied = dict[nameof(Occupied)].ToBool();
     }
 }
\ No newline at end of file
diff --git a/Assets/Tiles/Farm.asset b/Assets/Tiles/Farm.asset
index 80c131e..326eb50 100644
--- a/Assets/Tiles/Farm.asset
+++ b/Assets/Tiles/Farm.asset
@@ -15,5 +15,5 @@ MonoBehaviour:
   _sprite: {fileID: 21300000, guid: ccca3e050cb082b45af0a099790463f6, type: 3}
   _isCollidable: 0
   _yieldPrefab: {fileID: 6962989255644195630, guid: a2dc5d9672c10074fa9c35c12f6339c1, type: 3}
-  _yieldSpeed: 0.1
+  _yieldDuration: 5
   _randomPositionConfig: 0.25
diff --git a/Assets/Tiles/Forest.asset b/Assets/Tiles/Forest.asset
index acbedaa..88f485a 100644
--- a/Assets/Tiles/Forest.asset
+++ b/Assets/Tiles/Forest.asset
@@ -15,5 +15,5 @@ MonoBehaviour:
   _sprite: {fileID: 21300000, guid: 43582b3c6b60fd144bc56d8ab3b14349, type: 3}
   _isCollidable: 0
   _yieldPrefab: {fileID: 6962989255644195630, guid: f20569b5452c2b341a95d656b7534b7e, type: 3}
-  _yieldSpeed: 0.1
+  _yieldDuration: 5
   _randomPositionConfig: 0.5
diff --git a/Assets/Tiles/Meat.asset b/Assets/Tiles/Meat.asset
index 6ec392b..ddf80a2 100644
--- a/Assets/Tiles/Meat.asset
+++ b/Assets/Tiles/Meat.asset
@@ -15,5 +15,5 @@ MonoBehaviour:
   _sprite: {fileID: 21300000, guid: b1e6b8ebeb2e25f4f8c5de93a31dd6a2, type: 3}
   _isCollidable: 0
   _yieldPrefab: {fileID: 6962989255644195630, guid: a2dc5d9672c10074fa9c35c12f6339c1, type: 3}
-  _yieldSpeed: 0.1
+  _yieldDuration: 5
   _randomPositionConfig: 0.5
diff --git a/Assets/Tiles/RockNode.asset b/Assets/Tiles/RockNode.asset
index 90feadb..2899c44 100644
--- a/Assets/Tiles/RockNode.asset
+++ b/Assets/Tiles/RockNode.asset
@@ -15,5 +15,5 @@ MonoBehaviour:
   _sprite: {fileID: 21300000, guid: 6298844400e212d40bce870425ac2a5b, type: 3}
   _isCollidable: 0
   _yieldPrefab: {fileID: 6962989255644195630, guid: 484f0eca1c74ae34694692de56a36739, type: 3}
-  _yieldSpeed: 0.1
+  _yieldDuration: 5
   _randomPositionConfig: 0.5