diff --git a/Assets/YooAsset/Samples~/Space Shooter/GameRes/Scene/scene_home.unity b/Assets/YooAsset/Samples~/Space Shooter/GameRes/Scene/scene_home.unity
index 9d8ec1b..f575679 100644
--- a/Assets/YooAsset/Samples~/Space Shooter/GameRes/Scene/scene_home.unity	
+++ b/Assets/YooAsset/Samples~/Space Shooter/GameRes/Scene/scene_home.unity	
@@ -271,8 +271,8 @@ Canvas:
   m_GameObject: {fileID: 690216953}
   m_Enabled: 1
   serializedVersion: 3
-  m_RenderMode: 0
-  m_Camera: {fileID: 0}
+  m_RenderMode: 1
+  m_Camera: {fileID: 1631979429}
   m_PlaneDistance: 100
   m_PixelPerfect: 0
   m_ReceivesEvents: 1
@@ -296,6 +296,7 @@ RectTransform:
   m_Children:
   - {fileID: 1645250797}
   - {fileID: 287634993}
+  - {fileID: 1631979431}
   m_Father: {fileID: 0}
   m_RootOrder: 3
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
@@ -304,6 +305,80 @@ RectTransform:
   m_AnchoredPosition: {x: 0, y: 0}
   m_SizeDelta: {x: 0, y: 0}
   m_Pivot: {x: 0, y: 0}
+--- !u!1 &1631979428
+GameObject:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  serializedVersion: 6
+  m_Component:
+  - component: {fileID: 1631979431}
+  - component: {fileID: 1631979429}
+  m_Layer: 0
+  m_Name: UICamera
+  m_TagString: Untagged
+  m_Icon: {fileID: 0}
+  m_NavMeshLayer: 0
+  m_StaticEditorFlags: 0
+  m_IsActive: 1
+--- !u!20 &1631979429
+Camera:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1631979428}
+  m_Enabled: 1
+  serializedVersion: 2
+  m_ClearFlags: 3
+  m_BackGroundColor: {r: 0.19215687, g: 0.3019608, b: 0.4745098, a: 0}
+  m_projectionMatrixMode: 1
+  m_GateFitMode: 2
+  m_FOVAxisMode: 0
+  m_SensorSize: {x: 36, y: 24}
+  m_LensShift: {x: 0, y: 0}
+  m_FocalLength: 50
+  m_NormalizedViewPortRect:
+    serializedVersion: 2
+    x: 0
+    y: 0
+    width: 1
+    height: 1
+  near clip plane: 0.3
+  far clip plane: 1000
+  field of view: 60
+  orthographic: 1
+  orthographic size: 10
+  m_Depth: 1
+  m_CullingMask:
+    serializedVersion: 2
+    m_Bits: 32
+  m_RenderingPath: -1
+  m_TargetTexture: {fileID: 0}
+  m_TargetDisplay: 0
+  m_TargetEye: 3
+  m_HDR: 1
+  m_AllowMSAA: 1
+  m_AllowDynamicResolution: 0
+  m_ForceIntoRT: 0
+  m_OcclusionCulling: 1
+  m_StereoConvergence: 10
+  m_StereoSeparation: 0.022
+--- !u!4 &1631979431
+Transform:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1631979428}
+  m_LocalRotation: {x: -0, y: -0, z: -0, w: 1}
+  m_LocalPosition: {x: 0, y: 0, z: -100}
+  m_LocalScale: {x: 1, y: 1, z: 1}
+  m_Children: []
+  m_Father: {fileID: 690216957}
+  m_RootOrder: 2
+  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
 --- !u!1 &1645250796
 GameObject:
   m_ObjectHideFlags: 0
@@ -423,7 +498,7 @@ Camera:
   m_Depth: 0
   m_CullingMask:
     serializedVersion: 2
-    m_Bits: 4294967295
+    m_Bits: 23
   m_RenderingPath: -1
   m_TargetTexture: {fileID: 0}
   m_TargetDisplay: 0
diff --git a/Assets/YooAsset/Samples~/Space Shooter/GameScript/Runtime/GameLogic/SceneBattle.cs b/Assets/YooAsset/Samples~/Space Shooter/GameScript/Runtime/GameLogic/SceneBattle.cs
index 6689293..82e4165 100644
--- a/Assets/YooAsset/Samples~/Space Shooter/GameScript/Runtime/GameLogic/SceneBattle.cs	
+++ b/Assets/YooAsset/Samples~/Space Shooter/GameScript/Runtime/GameLogic/SceneBattle.cs	
@@ -56,8 +56,11 @@ internal class SceneBattle : MonoBehaviour
 		}
 
 		// 切换场景的时候释放资源
-		var package = YooAssets.GetPackage("DefaultPackage");
-		package.UnloadUnusedAssets();
+		if (YooAssets.Initialized)
+		{
+			var package = YooAssets.GetPackage("DefaultPackage");
+			package.UnloadUnusedAssets();
+		}
 	}
 	private void Update()
 	{
diff --git a/Assets/YooAsset/Samples~/Space Shooter/GameScript/Runtime/GameLogic/SceneHome.cs b/Assets/YooAsset/Samples~/Space Shooter/GameScript/Runtime/GameLogic/SceneHome.cs
index 5112c99..2138ab5 100644
--- a/Assets/YooAsset/Samples~/Space Shooter/GameScript/Runtime/GameLogic/SceneHome.cs	
+++ b/Assets/YooAsset/Samples~/Space Shooter/GameScript/Runtime/GameLogic/SceneHome.cs	
@@ -25,7 +25,10 @@ public class SceneHome : MonoBehaviour
 		}
 
 		// 切换场景的时候释放资源
-		var package = YooAssets.GetPackage("DefaultPackage");
-		package.UnloadUnusedAssets();
+		if (YooAssets.Initialized)
+		{
+			var package = YooAssets.GetPackage("DefaultPackage");
+			package.UnloadUnusedAssets();
+		}
 	}
 }
\ No newline at end of file