diff --git a/Assets/Scenes/TestDragAndDrop.unity b/Assets/Scenes/TestDragAndDrop.unity
index d6adc12..8a29ec0 100644
--- a/Assets/Scenes/TestDragAndDrop.unity
+++ b/Assets/Scenes/TestDragAndDrop.unity
@@ -160,7 +160,7 @@ RectTransform:
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 0, y: 0}
   m_AnchorMax: {x: 0, y: 0}
-  m_AnchoredPosition: {x: 60, y: 0}
+  m_AnchoredPosition: {x: 0, y: 0}
   m_SizeDelta: {x: 0, y: 0}
   m_Pivot: {x: 0.5, y: 0.5}
 --- !u!114 &34093566
@@ -636,7 +636,7 @@ PrefabInstance:
       objectReference: {fileID: 0}
     - target: {fileID: 5139721979244350189, guid: e20680474d73eee49836ff9cbc6d0b28, type: 3}
       propertyPath: m_AnchoredPosition.x
-      value: 22.5
+      value: 0
       objectReference: {fileID: 0}
     - target: {fileID: 5139721979244350189, guid: e20680474d73eee49836ff9cbc6d0b28, type: 3}
       propertyPath: m_AnchoredPosition.y
@@ -676,7 +676,7 @@ PrefabInstance:
       objectReference: {fileID: 0}
     - target: {fileID: 7106892478383455582, guid: e20680474d73eee49836ff9cbc6d0b28, type: 3}
       propertyPath: m_AnchoredPosition.x
-      value: 22.5
+      value: 0
       objectReference: {fileID: 0}
     - target: {fileID: 7106892478383455582, guid: e20680474d73eee49836ff9cbc6d0b28, type: 3}
       propertyPath: m_AnchoredPosition.y
@@ -700,7 +700,7 @@ PrefabInstance:
       objectReference: {fileID: 0}
     - target: {fileID: 7112938880036038065, guid: e20680474d73eee49836ff9cbc6d0b28, type: 3}
       propertyPath: m_AnchoredPosition.x
-      value: 22.5
+      value: 0
       objectReference: {fileID: 0}
     - target: {fileID: 7112938880036038065, guid: e20680474d73eee49836ff9cbc6d0b28, type: 3}
       propertyPath: m_AnchoredPosition.y
@@ -1477,7 +1477,7 @@ PrefabInstance:
       objectReference: {fileID: 0}
     - target: {fileID: 5139721979244350189, guid: afc444040d3adcf45a882e4882521f5e, type: 3}
       propertyPath: m_AnchoredPosition.x
-      value: 22.5
+      value: 0
       objectReference: {fileID: 0}
     - target: {fileID: 5139721979244350189, guid: afc444040d3adcf45a882e4882521f5e, type: 3}
       propertyPath: m_AnchoredPosition.y
@@ -1517,7 +1517,7 @@ PrefabInstance:
       objectReference: {fileID: 0}
     - target: {fileID: 7106892478383455582, guid: afc444040d3adcf45a882e4882521f5e, type: 3}
       propertyPath: m_AnchoredPosition.x
-      value: 22.5
+      value: 0
       objectReference: {fileID: 0}
     - target: {fileID: 7106892478383455582, guid: afc444040d3adcf45a882e4882521f5e, type: 3}
       propertyPath: m_AnchoredPosition.y
@@ -1541,7 +1541,7 @@ PrefabInstance:
       objectReference: {fileID: 0}
     - target: {fileID: 7112938880036038065, guid: afc444040d3adcf45a882e4882521f5e, type: 3}
       propertyPath: m_AnchoredPosition.x
-      value: 22.5
+      value: 0
       objectReference: {fileID: 0}
     - target: {fileID: 7112938880036038065, guid: afc444040d3adcf45a882e4882521f5e, type: 3}
       propertyPath: m_AnchoredPosition.y
@@ -1670,7 +1670,7 @@ RectTransform:
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 0, y: 0}
   m_AnchorMax: {x: 0, y: 0}
-  m_AnchoredPosition: {x: 175, y: 0}
+  m_AnchoredPosition: {x: 0, y: 0}
   m_SizeDelta: {x: 0, y: 0}
   m_Pivot: {x: 0.5, y: 0.5}
 --- !u!114 &1304104611
@@ -2473,7 +2473,7 @@ PrefabInstance:
       objectReference: {fileID: 0}
     - target: {fileID: 5139721979244350189, guid: e20680474d73eee49836ff9cbc6d0b28, type: 3}
       propertyPath: m_AnchoredPosition.x
-      value: 22.5
+      value: 0
       objectReference: {fileID: 0}
     - target: {fileID: 5139721979244350189, guid: e20680474d73eee49836ff9cbc6d0b28, type: 3}
       propertyPath: m_AnchoredPosition.y
@@ -2513,7 +2513,7 @@ PrefabInstance:
       objectReference: {fileID: 0}
     - target: {fileID: 7106892478383455582, guid: e20680474d73eee49836ff9cbc6d0b28, type: 3}
       propertyPath: m_AnchoredPosition.x
-      value: 22.5
+      value: 0
       objectReference: {fileID: 0}
     - target: {fileID: 7106892478383455582, guid: e20680474d73eee49836ff9cbc6d0b28, type: 3}
       propertyPath: m_AnchoredPosition.y
@@ -2537,7 +2537,7 @@ PrefabInstance:
       objectReference: {fileID: 0}
     - target: {fileID: 7112938880036038065, guid: e20680474d73eee49836ff9cbc6d0b28, type: 3}
       propertyPath: m_AnchoredPosition.x
-      value: 22.5
+      value: 0
       objectReference: {fileID: 0}
     - target: {fileID: 7112938880036038065, guid: e20680474d73eee49836ff9cbc6d0b28, type: 3}
       propertyPath: m_AnchoredPosition.y
diff --git a/Assets/Scripts/Resource/ResourceManager.cs b/Assets/Scripts/Resource/ResourceManager.cs
index ee984b2..3859a7c 100644
--- a/Assets/Scripts/Resource/ResourceManager.cs
+++ b/Assets/Scripts/Resource/ResourceManager.cs
@@ -5,12 +5,11 @@ using UnityEngine;
 /// </summary>
 public class ResourceManager : Singleton<ResourceManager>
 {
-    private static ResourceManager _instance = null;
     private int _rockAmount = 20;
     private int _woodAmount = 20;
     private int _foodAmount = 20;
 
-    private const int MAX = 100;
+    private const int MAX = int.MaxValue;
     private const int MIN = 0;
 
     public int RockAmount