diff --git a/core/components/Button.cpp b/core/components/Button.cpp
index 75a677d1..d3bf8d51 100644
--- a/core/components/Button.cpp
+++ b/core/components/Button.cpp
@@ -165,7 +165,7 @@ void easy2d::Button::SetPivot(float pivot_x, float pivot_y)
 
 bool easy2d::Button::Dispatch(const MouseEvent & e, bool handled)
 {
-	if (!handled && enabled_ && visible_ && normal_)
+	if (!handled && enabled_ && IsVisible() && normal_)
 	{
 		bool contains = normal_->ContainsPoint(e.GetPosition());
 		if (e.GetType() == MouseEvent::Type::LeftUp && is_selected_ && contains)
@@ -216,7 +216,7 @@ void easy2d::Button::Visit()
 {
 	Node::Visit();
 
-	if (visible_ &&
+	if (IsVisible() &&
 		!enabled_ &&
 		normal_ &&
 		normal_->ContainsPoint(Device::GetInput()->GetMousePos()))
diff --git a/core/e2dmacros.h b/core/e2dmacros.h
index 03c124f5..ce90416c 100644
--- a/core/e2dmacros.h
+++ b/core/e2dmacros.h
@@ -132,7 +132,7 @@
 
 #ifndef E2D_WARNING
 #	if defined( DEBUG ) || defined( _DEBUG )
-#		define E2D_WARNING(msg) do { ::OutputDebugStringW(L"Warning: " _CRT_WIDE(msg) L"\r\n"); } while(0)
+#		define E2D_WARNING(msg) do { ::OutputDebugStringW(L"[easy2d] Warning: " _CRT_WIDE(msg) L"\r\n"); } while(0)
 #	else
 #		define E2D_WARNING(msg) ((void)0)
 #	endif
@@ -141,7 +141,7 @@
 
 #ifndef E2D_WARNING_IF
 #	if defined( DEBUG ) || defined( _DEBUG )
-#		define E2D_WARNING_IF(exp, msg) do { if (exp) { ::OutputDebugStringW(L"Warning: " _CRT_WIDE(msg) L"\r\n"); } } while(0)
+#		define E2D_WARNING_IF(exp, msg) do { if (exp) { ::OutputDebugStringW(L"[easy2d] Warning: " _CRT_WIDE(msg) L"\r\n"); } } while(0)
 #	else
 #		define E2D_WARNING_IF(exp, msg) ((void)0)
 #	endif
diff --git a/core/e2dmodule.h b/core/e2dmodule.h
index 9c9b6454..585f1af0 100644
--- a/core/e2dmodule.h
+++ b/core/e2dmodule.h
@@ -201,52 +201,33 @@ namespace easy2d
 	};
 
 
-	// 启动选项
-	struct Options
-	{
-		String	title;		// 标题
-		int		width;		// 宽度
-		int		height;		// 高度
-		int		icon;		// 图标资源 ID
-		bool	debug_mode;	// 调试模式
-
-		Options()
-			: title(L"Easy2D Game")
-			, width(640)
-			, height(480)
-			, icon(0)
-			, debug_mode(false)
-		{
-		}
-	};
-
-
 	// 游戏控制器
 	class Game
 	{
 	public:
-		// 开始
-		virtual void Start() = 0;
+		// 开始时
+		virtual void OnStart() = 0;
 
-		// 更新
-		virtual void Update(float dt) {}
+		// 更新时
+		virtual void OnUpdate(float dt) {}
+
+		// 退出时
+		virtual void OnExit() {}
+
+		// 窗口关闭时
+		// 返回值：返回 false 将阻止窗口关闭
+		virtual bool OnClose() { return true; }
 
 		// 运行
-		void Run(
-			const Options& options = Options()
-		);
+		void Run();
 
 		// 结束
 		void Quit();
 
-		// 关闭窗口时触发
-		// 返回值：返回 false 将阻止窗口关闭
-		virtual bool OnExit() { return true; }
-
-		// 修改窗体大小
+		// 设置窗口大小
 		void SetSize(
-			int width,			/* 窗体宽度 */
-			int height			/* 窗体高度 */
+			int width,			/* 窗口宽度 */
+			int height			/* 窗口高度 */
 		);
 
 		// 设置窗体标题
@@ -259,6 +240,11 @@ namespace easy2d
 			int resource_id		/* 图标资源 ID */
 		);
 
+		// 调试模式
+		void SetDebugMode(
+			bool enabled
+		);
+
 		// 获取窗体标题
 		const String& GetTitle() const;
 
@@ -283,6 +269,26 @@ namespace easy2d
 		// 获取当前场景
 		Scene * GetCurrentScene();
 
+		// 获取实例
+		static Game * GetInstance();
+
+	protected:
+		Game();
+
+		~Game();
+
+		E2D_DISABLE_COPY(Game);
+
+	private:
+		// 初始化
+		void Init();
+
+		// 根据客户区大小定位窗口
+		Rect Locate(
+			int width,
+			int height
+		);
+
 		// 是否正在进行场景过渡
 		bool IsTransitioning() const;
 
@@ -294,23 +300,6 @@ namespace easy2d
 		// 渲染场景画面
 		void DrawScene();
 
-		// 获取实例
-		static Game * GetInstance();
-
-	protected:
-		Game();
-
-		~Game();
-
-		// 初始化
-		void Init();
-
-		// 根据客户区大小定位窗口
-		Rect Locate(
-			int width,
-			int height
-		);
-
 		// Win32 窗口消息回调程序
 		static LRESULT CALLBACK WndProc(
 			HWND hwnd,
@@ -319,7 +308,7 @@ namespace easy2d
 			LPARAM l_param
 		);
 
-	protected:
+	private:
 		HWND		hwnd_;
 		String		title_;
 		int			width_;
diff --git a/core/e2dobject.h b/core/e2dobject.h
index eb781583..e2bb93e8 100644
--- a/core/e2dobject.h
+++ b/core/e2dobject.h
@@ -107,7 +107,7 @@ namespace easy2d
 		// 清空缓存
 		static void ClearCache();
 
-	protected:
+	private:
 		E2D_DISABLE_COPY(Image);
 
 		// 缓存 Bitmap 资源
@@ -125,7 +125,7 @@ namespace easy2d
 			ID2D1Bitmap * bitmap
 		);
 
-	protected:
+	private:
 		Rect crop_rect_;
 		ID2D1Bitmap * bitmap_;
 
@@ -155,7 +155,7 @@ namespace easy2d
 		virtual void OnExit() {}
 
 		// 更新场景
-		virtual void Update(float dt) {}
+		virtual void OnUpdate(float dt) {}
 
 		// 设置根节点
 		void SetRoot(
@@ -186,12 +186,12 @@ namespace easy2d
 		// 获取转换矩阵
 		const D2D1::Matrix3x2F& GetTransform() const;
 
-	protected:
+	private:
 		E2D_DISABLE_COPY(Scene);
 
-	protected:
-		Node*	root_;
-		D2D1::Matrix3x2F transform_;
+	private:
+		Node*				root_;
+		D2D1::Matrix3x2F	transform_;
 	};
 
 
@@ -235,7 +235,7 @@ namespace easy2d
 		// 重置计时
 		void ResetTime();
 
-	protected:
+	private:
 		bool		running_;
 		bool		stopped_;
 		int			run_times_;
@@ -285,10 +285,10 @@ namespace easy2d
 		virtual ~Node();
 
 		// 渲染节点
-		virtual void Draw() const {}
+		virtual void OnDraw() const {}
 
 		// 更新节点
-		virtual void Update(float dt) {}
+		virtual void OnUpdate(float dt) {}
 
 		// 获取节点显示状态
 		bool IsVisible() const;
@@ -344,12 +344,15 @@ namespace easy2d
 		// 获取节点旋转角度
 		float GetRotation() const;
 
-		// 获取二维转换
+		// 获取二维转换矩阵
 		const Transform& GetTransform() const;
 
 		// 获取节点透明度
 		float GetOpacity() const;
 
+		// 获取显示透明度
+		float GetDisplayOpacity() const;
+
 		// 获取父节点
 		Node * GetParent() const;
 
@@ -634,19 +637,9 @@ namespace easy2d
 		const Tasks& GetAllTasks() const;
 
 	protected:
-		E2D_DISABLE_COPY(Node);
-
 		// 遍历节点
 		virtual void Visit();
 
-		// 渲染节点边缘
-		void DrawBorder();
-
-		// 设置节点所在场景
-		void SetParentScene(
-			Scene * scene
-		);
-
 		// 分发鼠标消息
 		virtual bool Dispatch(
 			const MouseEvent& e,
@@ -659,6 +652,17 @@ namespace easy2d
 			bool handled
 		);
 
+	private:
+		E2D_DISABLE_COPY(Node);
+
+		// 渲染节点边缘
+		void DrawBorder();
+
+		// 设置节点所在场景
+		void SetParentScene(
+			Scene * scene
+		);
+
 		// 更新子节点
 		void UpdateChildren(float dt);
 
@@ -677,23 +681,23 @@ namespace easy2d
 		// 更新节点时间
 		void UpdateTime();
 
-	protected:
-		String		name_;
-		size_t		hash_name_;
-		Transform	transform_;
-		float		display_opacity_;
-		float		real_opacity_;
-		int			order_;
-		bool		visible_;
-		bool		clip_enabled_;
-		bool		dirty_sort_;
-		bool		dirty_transform_;
-		Scene *		parent_scene_;
-		Node *		parent_;
-		Color		border_color_;
-		Actions		actions_;
-		Tasks		tasks_;
-		Nodes		children_;
+	private:
+		String				name_;
+		size_t				hash_name_;
+		Transform			transform_;
+		float				display_opacity_;
+		float				real_opacity_;
+		int					order_;
+		bool				visible_;
+		bool				clip_enabled_;
+		bool				dirty_sort_;
+		bool				dirty_transform_;
+		Scene*				parent_scene_;
+		Node*				parent_;
+		Color				border_color_;
+		Actions				actions_;
+		Tasks				tasks_;
+		Nodes				children_;
 		ID2D1Geometry*		border_;
 		D2D1::Matrix3x2F	initial_matrix_;
 		D2D1::Matrix3x2F	final_matrix_;
@@ -755,13 +759,13 @@ namespace easy2d
 		Image * GetImage() const;
 
 		// 渲染精灵
-		virtual void Draw() const override;
+		virtual void OnDraw() const override;
 
-	protected:
+	private:
 		E2D_DISABLE_COPY(Sprite);
 
-	protected:
-		Image * image_;
+	private:
+		Image* image_;
 	};
 
 
@@ -959,9 +963,9 @@ namespace easy2d
 		);
 
 		// 渲染文字
-		virtual void Draw() const override;
+		virtual void OnDraw() const override;
 
-	protected:
+	private:
 		E2D_DISABLE_COPY(Text);
 
 		// 重新排版文字
@@ -973,12 +977,12 @@ namespace easy2d
 		// 创建文字布局
 		void CreateLayout();
 
-	protected:
-		String	text_;
-		Font	font_;
-		Style	style_;
-		IDWriteTextFormat * text_format_;
-		IDWriteTextLayout * text_layout_;
+	private:
+		String				text_;
+		Font				font_;
+		Style				style_;
+		IDWriteTextFormat*	text_format_;
+		IDWriteTextLayout*	text_layout_;
 	};
 
 
@@ -1082,16 +1086,16 @@ namespace easy2d
 			float radius_y
 		);
 
-	protected:
+	private:
 		E2D_DISABLE_COPY(Canvas);
 
-	protected:
-		float	stroke_width_;
-		Stroke	stroke_;
-		ID2D1RenderTarget * render_target_;
-		ID2D1SolidColorBrush * fill_brush_;
-		ID2D1SolidColorBrush * line_brush_;
-		ID2D1StrokeStyle * stroke_style_;
+	private:
+		float					stroke_width_;
+		Stroke					stroke_;
+		ID2D1RenderTarget*		render_target_;
+		ID2D1SolidColorBrush*	fill_brush_;
+		ID2D1SolidColorBrush*	line_brush_;
+		ID2D1StrokeStyle*		stroke_style_;
 	};
 
 } // end of easy2d namespace
diff --git a/core/e2dutil.h b/core/e2dutil.h
index 76f8d60e..274ec0d4 100644
--- a/core/e2dutil.h
+++ b/core/e2dutil.h
@@ -505,7 +505,7 @@ namespace easy2d
 
 		E2D_OP_EXPLICIT operator bool() const;
 
-	protected:
+	private:
 		std::function<void()> func_;
 	};
 
@@ -539,7 +539,7 @@ namespace easy2d
 		Duration& operator += (Duration const &);
 		Duration& operator -= (Duration const &);
 
-	protected:
+	private:
 		std::chrono::milliseconds duration_ms_;
 	};
 
@@ -567,7 +567,7 @@ namespace easy2d
 		// 获取当前时间
 		static Time Now();
 
-	protected:
+	private:
 		std::chrono::steady_clock::time_point time_;
 	};
 
@@ -663,7 +663,7 @@ namespace easy2d
 		// 获取引用计数
 		LONG GetRefCount() const;
 
-	protected:
+	private:
 		LONG ref_count_;
 	};
 
diff --git a/core/modules/Game.cpp b/core/modules/Game.cpp
index 1c2b0974..291b141f 100644
--- a/core/modules/Game.cpp
+++ b/core/modules/Game.cpp
@@ -78,19 +78,13 @@ easy2d::Game::~Game()
 	::CoUninitialize();
 }
 
-void easy2d::Game::Run(const Options& options)
+void easy2d::Game::Run()
 {
-	title_ = options.title;
-	width_ = options.width;
-	height_ = options.height;
-	icon_ = options.icon;
-	debug_mode_ = options.debug_mode;
-
 	// 初始化
 	Init();
 
 	// 开始
-	Start();
+	OnStart();
 
 	// 刷新场景
 	if (next_scene_)
@@ -118,7 +112,7 @@ void easy2d::Game::Run(const Options& options)
 			last = now;
 
 			Device::GetInput()->Flush();
-			Update(dt);
+			OnUpdate(dt);
 			UpdateScene(dt);
 			DrawScene();
 
@@ -155,11 +149,7 @@ void easy2d::Game::EnterScene(Scene * scene, Transition * transition)
 		return;
 	}
 
-	if (next_scene_ != nullptr)
-	{
-		E2D_WARNING("Scene is transitioning...");
-		return;
-	}
+	if (curr_scene_ == scene) { return; }
 
 	if (next_scene_)
 	{
@@ -198,7 +188,7 @@ void easy2d::Game::UpdateScene(float dt)
 	{
 		if (scene)
 		{
-			scene->Update(dt);
+			scene->OnUpdate(dt);
 			Node * root = scene->GetRoot();
 			if (root)
 			{
@@ -487,6 +477,11 @@ void easy2d::Game::SetIcon(int resource_id)
 	}
 }
 
+void easy2d::Game::SetDebugMode(bool enabled)
+{
+	debug_mode_ = enabled;
+}
+
 
 LRESULT easy2d::Game::WndProc(HWND hwnd, UINT msg, WPARAM w_param, LPARAM l_param)
 {
@@ -596,7 +591,7 @@ LRESULT easy2d::Game::WndProc(HWND hwnd, UINT msg, WPARAM w_param, LPARAM l_para
 	// 窗口关闭消息
 	case WM_CLOSE:
 	{
-		if (game->OnExit())
+		if (game->OnClose())
 		{
 			game->Quit();
 		}
diff --git a/core/objects/Node.cpp b/core/objects/Node.cpp
index c4d9c541..8372c828 100644
--- a/core/objects/Node.cpp
+++ b/core/objects/Node.cpp
@@ -84,7 +84,7 @@ void easy2d::Node::Visit()
 	if (children_.empty())
 	{
 		render_target->SetTransform(final_matrix_);
-		Draw();
+		OnDraw();
 	}
 	else
 	{
@@ -116,7 +116,7 @@ void easy2d::Node::Visit()
 		}
 		
 		render_target->SetTransform(final_matrix_);
-		Draw();
+		OnDraw();
 
 		// 访问剩余节点
 		for (; i < children_.size(); ++i)
@@ -133,7 +133,7 @@ void easy2d::Node::UpdateChildren(float dt)
 {
 	if (children_.empty())
 	{
-		Update(dt);
+		OnUpdate(dt);
 		UpdateActions();
 		UpdateTasks();
 		UpdateTransform();
@@ -155,7 +155,7 @@ void easy2d::Node::UpdateChildren(float dt)
 			}
 		}
 
-		Update(dt);
+		OnUpdate(dt);
 		UpdateActions();
 		UpdateTasks();
 		UpdateTransform();
@@ -416,6 +416,11 @@ float easy2d::Node::GetOpacity() const
 	return real_opacity_;
 }
 
+float easy2d::Node::GetDisplayOpacity() const
+{
+	return display_opacity_;
+}
+
 int easy2d::Node::GetOrder() const
 {
 	return order_;
diff --git a/core/objects/Sprite.cpp b/core/objects/Sprite.cpp
index 1e0b5f0a..910ffde5 100644
--- a/core/objects/Sprite.cpp
+++ b/core/objects/Sprite.cpp
@@ -127,21 +127,21 @@ easy2d::Image * easy2d::Sprite::GetImage() const
 	return image_;
 }
 
-void easy2d::Sprite::Draw() const
+void easy2d::Sprite::OnDraw() const
 {
 	if (image_ && image_->GetBitmap())
 	{
 		auto crop_pos = image_->GetCropPos();
 		Device::GetGraphics()->GetRenderTarget()->DrawBitmap(
 			image_->GetBitmap(),
-			D2D1::RectF(0, 0, transform_.size.width, transform_.size.height),
-			display_opacity_,
+			D2D1::RectF(0, 0, GetTransform().size.width, GetTransform().size.height),
+			GetDisplayOpacity(),
 			D2D1_BITMAP_INTERPOLATION_MODE_LINEAR,
 			D2D1::RectF(
 				crop_pos.x,
 				crop_pos.y,
-				crop_pos.y + transform_.size.width,
-				crop_pos.y + transform_.size.height
+				crop_pos.y + GetTransform().size.width,
+				crop_pos.y + GetTransform().size.height
 			)
 		);
 	}
diff --git a/core/objects/Text.cpp b/core/objects/Text.cpp
index 76749f25..ecd001e6 100644
--- a/core/objects/Text.cpp
+++ b/core/objects/Text.cpp
@@ -308,15 +308,15 @@ void easy2d::Text::SetOutlineStroke(Stroke outline_stroke)
 	style_.outline_stroke = outline_stroke;
 }
 
-void easy2d::Text::Draw() const
+void easy2d::Text::OnDraw() const
 {
 	if (text_layout_)
 	{
 		auto graphics = Device::GetGraphics();
 		// 创建文本区域
-		D2D1_RECT_F textLayoutRect = D2D1::RectF(0, 0, transform_.size.width, transform_.size.height);
+		D2D1_RECT_F textLayoutRect = D2D1::RectF(0, 0, GetTransform().size.width, GetTransform().size.height);
 		// 设置画刷颜色和透明度
-		graphics->GetSolidBrush()->SetOpacity(display_opacity_);
+		graphics->GetSolidBrush()->SetOpacity(GetDisplayOpacity());
 		// 获取文本渲染器
 		auto text_renderer = graphics->GetTextRender();
 		graphics->SetTextRendererStyle(
@@ -449,7 +449,7 @@ void easy2d::Text::CreateLayout()
 				(const wchar_t *)text_,
 				length,
 				text_format_,
-				transform_.size.width,
+				GetTransform().size.width,
 				0,
 				&text_layout_
 			)
diff --git a/core/tools/Music.cpp b/core/tools/Music.cpp
index 7dc79213..31c88f7d 100644
--- a/core/tools/Music.cpp
+++ b/core/tools/Music.cpp
@@ -41,12 +41,12 @@ namespace
 
 	inline void TraceError(LPCWSTR output)
 	{
-		OutputDebugStringExW(L"Music error: %s failed!\r\n", output);
+		OutputDebugStringExW(L"[easy2d] Music error: %s failed!\r\n", output);
 	}
 
 	inline void TraceError(LPCWSTR output, HRESULT hr)
 	{
-		OutputDebugStringExW(L"Music error: %s (%#X)\r\n", output, hr);
+		OutputDebugStringExW(L"[easy2d] Music error: %s (%#X)\r\n", output, hr);
 	}
 }