diff --git a/scripts/entities/plants/RuntimePlantData.cs b/scripts/entities/plants/RuntimePlantData.cs
index 82d0a01..a6ddd56 100644
--- a/scripts/entities/plants/RuntimePlantData.cs
+++ b/scripts/entities/plants/RuntimePlantData.cs
@@ -20,7 +20,7 @@ public partial class RuntimePlantData : Entity
     }
     public override void Kill()
     {
-        PoolContainer.Instance.EntityField[Resource.Layer].Remove(GlobalPosition);
+        PoolContainer.Instance.RemoveEntity(GlobalPosition, Resource.Layer);
         QueueFree();
     }
 }
diff --git a/scripts/gui/ShovelButton.cs b/scripts/gui/ShovelButton.cs
index c1ba12e..4853b35 100644
--- a/scripts/gui/ShovelButton.cs
+++ b/scripts/gui/ShovelButton.cs
@@ -96,7 +96,7 @@ public partial class ShovelButton : TextureButton
         var checkedPosition = (position / FieldParams.Tile).Ceil() * FieldParams.Tile - new Vector2(20, 14);
         for (int i = FieldParams.LayersCount - 1; i >= 0; i--)
         {
-            if (PoolContainer.Instance.EntityField[i].TryGetValue(checkedPosition, out var entity) && entity is RuntimePlantData plantData)
+            if (PoolContainer.Instance.TryGetEntity(checkedPosition, out RuntimePlantData plantData,i))
             {
                 return plantData;
             }
diff --git a/scripts/level/InitialPackedSceneSpawner.cs b/scripts/level/InitialPackedSceneSpawner.cs
index 459ddce..f5e9a64 100644
--- a/scripts/level/InitialPackedSceneSpawner.cs
+++ b/scripts/level/InitialPackedSceneSpawner.cs
@@ -33,20 +33,20 @@ public partial class InitialPackedSceneSpawner : Node
 						if (entity is RuntimeZombieData)
 						{
 							PoolContainer.Instance.Zombies.AddChild(node);
-							node.GlobalPosition = position + new Vector2(0,0.5f*FieldParams.TileHeight);
+							node.GlobalPosition = position + new Vector2(0, 0.5f * FieldParams.TileHeight);
 						}
 						else if (entity is RuntimePlantData plant)
 						{
 							PoolContainer.Instance.Plants.AddChild(plant);
 							node.GlobalPosition = position;
 							plant.Resource = GameRegistry.GetEntityByName(plant.Resource.GetInternalID()) as PlantResource;
-							PoolContainer.Instance.EntityField[plant.Resource.Layer].Add(plant.GlobalPosition, plant);
+							PoolContainer.Instance.TrySetEntity(plant.GlobalPosition, plant, plant.Resource.Layer);
 						}
 						else
 						{
 							PoolContainer.Instance.Structures.AddChild(entity);
 							node.GlobalPosition = position;
-							PoolContainer.Instance.EntityField[1].Add(entity.GlobalPosition, entity);
+							PoolContainer.Instance.TrySetEntity(entity.GlobalPosition,entity,1);
 						}
 					}
 					else
diff --git a/scripts/level/PlantField.cs b/scripts/level/PlantField.cs
index d54a11b..aac1a4b 100644
--- a/scripts/level/PlantField.cs
+++ b/scripts/level/PlantField.cs
@@ -59,7 +59,7 @@ public partial class PlantField : Node2D
 
         bool canPlace = _resource != null
             && inBoundary
-            && PoolContainer.Instance.EntityField[_resource.Layer].ContainsKey(expected_pos) == false
+            && PoolContainer.Instance.IsPositionVacant(expected_pos,_resource.Layer)
             && RuntimeLevelData.Instance.CheckSpendSun((int)_resource.Cost);
 
         // Setting visuals
@@ -96,7 +96,7 @@ public partial class PlantField : Node2D
             plant.GlobalPosition = (_plantSetter.GlobalPosition / FieldParams.Tile).Ceil() * FieldParams.Tile - new Vector2(20, 14);
             plant.Resource = (PlantResource)_resource;
 
-            PoolContainer.Instance.EntityField[_resource.Layer].Add(plant.GlobalPosition, plant);
+            PoolContainer.Instance.TrySetEntity(plant.GlobalPosition,plant,_resource.Layer);
 
             RuntimeLevelData.Instance.SpendSun((int)_resource.Cost);
 
diff --git a/scripts/level/PoolContainer.cs b/scripts/level/PoolContainer.cs
index 4be8269..156d47e 100644
--- a/scripts/level/PoolContainer.cs
+++ b/scripts/level/PoolContainer.cs
@@ -24,39 +24,39 @@ public partial class PoolContainer : Node2D
 
     public static PoolContainer Instance { get; private set; }
 
-    public Dictionary<Vector2, Entity>[] EntityField = { new(), new(), new() };
+    //public Dictionary<Vector2, Entity>[] EntityField = { new(), new(), new() };
+    private readonly Entity[,] EntityField = new Entity[3,FieldParams.ColumnsCount * FieldParams.RowsCount];
     public override void _EnterTree()
     {
         Instance = this;
     }
-    public bool TryGetEntity(Vector2 key, out Entity result, int layer = 1)
+    public bool TryGetEntity<T>(Vector2 positionVector, out T result, int layer = 1) where T : Entity
     {
-        if (EntityField[layer].ContainsKey(key))
-        {
-            result = EntityField[layer][key];
-        }
-        else
-        {
-            result = null;
-        }
-        return EntityField[layer].ContainsKey(key)
-                && EntityField[layer][key] != null;
-    }
-
-    public bool TryGetEntity<T>(Vector2 key, out T result, int layer = 1) where T : class
-    {
-        if (EntityField[layer].ContainsKey(key))
-        {
-            result = EntityField[layer][key] as T;
-        }
-        else
-        {
-            result = null;
-        }
-        return EntityField[layer].ContainsKey(key)
-                && EntityField[layer][key] != null
+        var position = VectorToIndex(positionVector);
+        result = EntityField[layer, position] as T;
+        return EntityField[layer,position] != null
                 && result != null;
     }
+    public bool TrySetEntity(Vector2 positionVector, Entity whatToSet, int layer = 1)
+    {
+        var position = VectorToIndex(positionVector);
+        if (IsPositionVacant(positionVector, layer) == false) return false;
+        EntityField[layer, position] = whatToSet;
+        return true;
+    }
+    public bool IsPositionVacant(Vector2 positionVector, int layer = 1)
+    {
+        return EntityField[layer, VectorToIndex(positionVector)] == null;
+    }
+    public void RemoveEntity(Vector2 positionVector, int layer = 1)
+    {
+        EntityField[layer, VectorToIndex(positionVector)] = null;
+    }
+    public static int VectorToIndex(Vector2 vector)
+    {
+        var intedVec = (vector - FieldParams.LeftFieldBoundary) / FieldParams.Tile;
+        return (int)intedVec.X + (int)intedVec.Y * FieldParams.ColumnsCount;
+    }
 
     public void SpawnParticles(PackedScene particles, Vector2 position, float rotation = 0)
     {
diff --git a/scripts/systems/static-data/FieldParams.cs b/scripts/systems/static-data/FieldParams.cs
index 4eca66e..e3f0d26 100644
--- a/scripts/systems/static-data/FieldParams.cs
+++ b/scripts/systems/static-data/FieldParams.cs
@@ -7,6 +7,8 @@ public class FieldParams
 	public const int TileWidth = 50;
 	public const int TileHeight = 60;
 	public const int LayersCount = 3;
+	public const int ColumnsCount = 9;
+	public const int RowsCount = 5;
 	public static Vector2I LeftFieldBoundary = new(305, 76);
 	public static Vector2I RightFieldBoundary = new(755, 376);
 	public static readonly Vector2 Tile = new(TileWidth, TileHeight);