diff --git a/popcorn/Assets/MyGame/Scenes/MiniGame/MiniGame.unity b/popcorn/Assets/MyGame/Scenes/MiniGame/MiniGame.unity
index fb677033..2d4a0327 100644
--- a/popcorn/Assets/MyGame/Scenes/MiniGame/MiniGame.unity
+++ b/popcorn/Assets/MyGame/Scenes/MiniGame/MiniGame.unity
@@ -1860,6 +1860,7 @@ GameObject:
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@@ -1944,6 +1945,18 @@ MonoBehaviour:
   generateStageCount: 1
   beginStageOffset: 0.5
   partsToPartsOffset: 0
+--- !u!114 &1870432537
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+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1870432532}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: a554772b1d9244b29ee1ba77aae187a5, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
 --- !u!114 &1932485204
 MonoBehaviour:
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diff --git a/popcorn/Assets/MyGame/Scenes/MiniGame/Scripts/DifficultyChanger.cs b/popcorn/Assets/MyGame/Scenes/MiniGame/Scripts/DifficultyChanger.cs
new file mode 100644
index 00000000..a5731479
--- /dev/null
+++ b/popcorn/Assets/MyGame/Scenes/MiniGame/Scripts/DifficultyChanger.cs
@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using UniRx;
+using UnityEngine;
+
+namespace MyGame.Scenes.MiniGame.Scripts
+{
+    public class DifficultyChanger : MonoBehaviour
+    {
+        public IReadOnlyReactiveProperty<ScrollGameDifficulty> Difficulty => difficulty;
+        private readonly ReactiveProperty<ScrollGameDifficulty> difficulty = new();
+        private readonly CompositeDisposable changeDifficultyDisposable = new();
+        private ScrollGameStageDifficultyData difficultyData;
+
+        private void Start()
+        {
+            difficulty.AddTo(this);
+            changeDifficultyDisposable.AddTo(this);
+        }
+
+        public void SetData(ScrollGameStageDifficultyData data) => difficultyData = data;
+
+        public void UpdateTime(float elapsed)
+        {
+            difficulty.Value = difficultyData.GetDifficultySwitchTime(elapsed);
+        }
+    }
+}
\ No newline at end of file
diff --git a/popcorn/Assets/MyGame/Scenes/MiniGame/Scripts/DifficultyChanger.cs.meta b/popcorn/Assets/MyGame/Scenes/MiniGame/Scripts/DifficultyChanger.cs.meta
new file mode 100644
index 00000000..b107fba1
--- /dev/null
+++ b/popcorn/Assets/MyGame/Scenes/MiniGame/Scripts/DifficultyChanger.cs.meta
@@ -0,0 +1,3 @@
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\ No newline at end of file