diff --git a/.gitignore b/.gitignore
index 0b7cc5a..74c1981 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,12 +1,16 @@
-# Godot 4+ specific ignores
-.godot/
-/android/
+# Godot 项目文件
+main/.godot/
+main/android/
 
-# C++ 扩展编译产物
-/build/
-/bin/
+# C++ 编译产物
+build/
+main/bin/
+
+# IDE
 *.user
 *.suo
+.vs/
+.vscode/
 
 # 其他
 .DS_Store
diff --git a/.godot/.gdignore b/.godot/.gdignore
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/.godot/.gdignore
@@ -0,0 +1 @@
+
diff --git a/.godot/editor/editor_layout.cfg b/.godot/editor/editor_layout.cfg
new file mode 100644
index 0000000..4d36f4e
--- /dev/null
+++ b/.godot/editor/editor_layout.cfg
@@ -0,0 +1,73 @@
+[docks]
+
+dock_3_selected_tab_idx=0
+dock_4_selected_tab_idx=0
+dock_5_selected_tab_idx=0
+dock_floating={}
+dock_closed=[]
+dock_split_2=0
+dock_split_3=0
+dock_hsplit_1=0
+dock_hsplit_2=280
+dock_hsplit_3=-280
+dock_hsplit_4=0
+dock_3="Scene,Import"
+dock_4="FileSystem,History"
+dock_5="Inspector,Signals,Groups"
+dock_9="Output,Debugger,Audio,Animation,Shader Editor,Search Results,AnimationTree,ResourcePreloader,ShaderFile,SpriteFrames,Theme,Polygon,TileSet,TileMap,Replication,GridMap"
+
+[docks/FileSystem]
+
+h_split_offset=300
+v_split_offset=0
+display_mode=0
+file_sort=0
+file_list_display_mode=1
+selected_paths=PackedStringArray("res://")
+uncollapsed_paths=PackedStringArray("Favorites", "res://")
+
+[docks/History]
+
+include_scene=true
+include_global=true
+
+[EditorNode]
+
+open_scenes=PackedStringArray()
+current_scene=""
+bottom_panel_offsets={
+"Animation": 0,
+"Audio": -450,
+"Debugger": 0,
+"Output": 0,
+"Shader Editor": 0
+}
+selected_default_debugger_tab_idx=0
+selected_main_editor_idx=0
+
+[EditorWindow]
+
+screen=0
+mode="maximized"
+position=Vector2i(0, 45)
+
+[ScriptEditor]
+
+open_scripts=[]
+selected_script=""
+open_help=[]
+script_split_offset=250
+list_split_offset=0
+zoom_factor=1.0
+
+[GameView]
+
+floating_window_rect=Rect2i(0, 0, 0, 0)
+floating_window_screen=-1
+
+[ShaderEditor]
+
+open_shaders=[]
+split_offset=250
+selected_shader=""
+text_shader_zoom_factor=1.0
diff --git a/.godot/editor/editor_script_doc_cache.res b/.godot/editor/editor_script_doc_cache.res
new file mode 100644
index 0000000..0bd0a9f
Binary files /dev/null and b/.godot/editor/editor_script_doc_cache.res differ
diff --git a/.godot/editor/editor_script_doc_cache.res-folding-a7de57390d6e786984ca20c70a831128.cfg b/.godot/editor/editor_script_doc_cache.res-folding-a7de57390d6e786984ca20c70a831128.cfg
new file mode 100644
index 0000000..e860dd4
--- /dev/null
+++ b/.godot/editor/editor_script_doc_cache.res-folding-a7de57390d6e786984ca20c70a831128.cfg
@@ -0,0 +1,3 @@
+[folding]
+
+sections_unfolded=PackedStringArray()
diff --git a/.godot/editor/favorites.CanvasItem b/.godot/editor/favorites.CanvasItem
new file mode 100644
index 0000000..e69de29
diff --git a/.godot/editor/favorites.Node b/.godot/editor/favorites.Node
new file mode 100644
index 0000000..e69de29
diff --git a/.godot/editor/filesystem_cache10 b/.godot/editor/filesystem_cache10
new file mode 100644
index 0000000..d712abc
--- /dev/null
+++ b/.godot/editor/filesystem_cache10
@@ -0,0 +1,3 @@
+63f7b34db8d8cdea90c76aacccf841ec
+::res://::1770910434
+icon.svg::CompressedTexture2D::1032248987546973613::1770899576::1770899582::1::::<><><>0<>0<>a844cc33f2422ec468dcd6fc2526be58<>res://.godot/imported/icon.svg-218a8f2b3041327d8a5756f3a245f83b.ctex::
diff --git a/.godot/editor/project_metadata.cfg b/.godot/editor/project_metadata.cfg
new file mode 100644
index 0000000..ec3e5a2
--- /dev/null
+++ b/.godot/editor/project_metadata.cfg
@@ -0,0 +1,11 @@
+[game_view]
+
+select_mode=0
+
+[editor_metadata]
+
+executable_path="F:/Godot_v4.6-stable_win64.exe"
+
+[dialog_bounds]
+
+create_new_node=Rect2(397, 162, 1624, 875)
diff --git a/.godot/editor/script_editor_cache.cfg b/.godot/editor/script_editor_cache.cfg
new file mode 100644
index 0000000..e69de29
diff --git a/.godot/global_script_class_cache.cfg b/.godot/global_script_class_cache.cfg
new file mode 100644
index 0000000..32c2394
--- /dev/null
+++ b/.godot/global_script_class_cache.cfg
@@ -0,0 +1 @@
+list=[]
diff --git a/.godot/imported/icon.svg-218a8f2b3041327d8a5756f3a245f83b.ctex b/.godot/imported/icon.svg-218a8f2b3041327d8a5756f3a245f83b.ctex
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index 0000000..6e1d156
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diff --git a/.godot/imported/icon.svg-218a8f2b3041327d8a5756f3a245f83b.md5 b/.godot/imported/icon.svg-218a8f2b3041327d8a5756f3a245f83b.md5
new file mode 100644
index 0000000..49879df
--- /dev/null
+++ b/.godot/imported/icon.svg-218a8f2b3041327d8a5756f3a245f83b.md5
@@ -0,0 +1,3 @@
+source_md5="a16f2eed1b4496c4abf03d329708ba09"
+dest_md5="b48bef1f2eefdd190e0a3e60a6188d75"
+
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diff --git a/CLAUDE.md b/CLAUDE.md
new file mode 100644
index 0000000..185530a
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1,84 @@
+# Pingpang
+
+乒乓球对战游戏 — Godot 4.6 + C++ GDExtension
+
+## 项目结构
+
+```
+pingpang/
+├── CMakeLists.txt              # CMake 构建配置
+├── build-pingpang.bat          # Windows 一键编译脚本
+├── godot-cpp/                  # Godot C++ 绑定（git submodule, 4.5 分支）
+├── src/                        # C++ 源码
+│   ├── register_types.cpp/h    # GDExtension 入口 + 类注册
+│   ├── pingpong_ball.cpp/h     # 球（移动、碰撞、得分检测）
+│   ├── pingpong_paddle.cpp/h   # 球拍（玩家输入 / AI）
+│   └── pingpong_game.cpp/h     # 游戏管理（计分、状态）
+├── main/                       # Godot 项目目录
+│   ├── project.godot           # Godot 项目配置
+│   ├── pingpang.gdextension    # GDExtension 加载配置
+│   ├── scenes/
+│   │   └── main.tscn           # 主场景
+│   ├── bin/                    # 编译产物（gitignore）
+│   │   └── pingpang.dll
+│   └── .godot/                 # Godot 编辑器数据（gitignore）
+└── bin/                        # 历史遗留（即将清理）
+```
+
+## 开发环境
+
+| 工具 | 版本/路径 |
+|---|---|
+| Godot 编辑器 | 4.6 (`F:/PCL/MyDownload/Godot_v4.6-stable_win64.exe`) |
+| CMake | VS 2026 自带 |
+| Visual Studio | 2026 (`D:/Visual Studio/`) |
+| godot-cpp | 4.5 分支 |
+
+## 编译 & 运行
+
+### 编译 C++ 扩展
+
+```bash
+# Windows: 双击运行
+build-pingpang.bat
+
+# 或手动
+cmake -S . -B build -G "Visual Studio 18 2026" -A x64
+cmake --build build --config Release
+```
+
+编译产物 `pingpang.dll` 会自动输出到 `main/bin/`。
+
+### 打开 Godot 项目
+
+1. 启动 Godot 4.6 编辑器
+2. 导入项目 → 选择 `main/` 目录
+3. 打开后直接按 F5 运行
+
+## 核心类说明
+
+### PingPongBall (CharacterBody2D)
+- `speed: float` — 球速（默认 400）
+- `reset()` — 重置到屏幕中央，随机方向发射
+- `scored(which: int)` 信号 — 0=左边得分, 1=右边得分
+
+### PingPongPaddle (CharacterBody2D)
+- `speed: float` — 移动速度（默认 350）
+- `is_player: bool` — true=玩家控制, false=AI
+- `ball_path: NodePath` — AI 模式下追踪的球节点
+
+### PingPongGame (Node2D)
+- `left_score: int` / `right_score: int` — 当前比分
+- `max_score: int` — 获胜分数（默认 5）
+- `game_over(winner: int)` 信号 — 0=左边赢, 1=右边赢
+
+## 协作指南
+
+1. **添加新的 GDExtension 类**：
+   - 在 `src/` 创建 `.cpp`/`.h` 文件
+   - 在 `src/register_types.cpp` 中 `GDREGISTER_CLASS()`
+   - 在 `CMakeLists.txt` 的 `add_library()` 中添加源文件
+
+2. **场景编辑**：在 Godot 编辑器中编辑 `main/scenes/main.tscn`，所有 C++ 类可在节点列表中直接创建
+
+3. **提交代码前**：确保 `build-pingpang.bat` 编译通过
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 34bccae..8a293ad 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.24)
-project(marry)
+project(pingpang)
 
 # 标准 C++17
 set(CMAKE_CXX_STANDARD 17)
@@ -11,31 +11,34 @@ set(GODOT_CPP_PATH "${CMAKE_CURRENT_SOURCE_DIR}/godot-cpp")
 add_subdirectory("${GODOT_CPP_PATH}")
 
 # 扩展库本体
-add_library(marry SHARED
+add_library(pingpang SHARED
     src/register_types.cpp
-    src/example.cpp
-    src/example.h
     src/register_types.h
+    src/pingpong_ball.cpp
+    src/pingpong_ball.h
+    src/pingpong_paddle.cpp
+    src/pingpong_paddle.h
+    src/pingpong_game.cpp
+    src/pingpong_game.h
 )
 
-target_include_directories(marry PRIVATE src)
+target_include_directories(pingpang PRIVATE src)
 
 # 链接 godot-cpp
-target_link_libraries(marry PRIVATE godot-cpp)
+target_link_libraries(pingpang PRIVATE godot-cpp)
 
-# 输出到 bin/ 目录（Godot 从那里加载；VS 里编译后 dll 直接落到 res://bin/）
-set_target_properties(marry PROPERTIES
-    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/bin"
-    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/bin"
-    ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/bin"
+# 输出到 main/bin/ 目录（Godot 项目从这里加载 GDExtension）
+set_target_properties(pingpang PROPERTIES
+    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/main/bin"
+    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/main/bin"
+    ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/main/bin"
     PREFIX ""
 )
 
-# VS 多配置生成器会输出到 bin/Release/ 等子目录，这里复制到 bin/ 根目录
-# 保证 .gdextension 里 res://bin/marry.dll 始终能找到
-add_custom_command(TARGET marry POST_BUILD
+# VS 多配置生成器会输出到子目录，这里复制到 main/bin/ 根目录
+add_custom_command(TARGET pingpang POST_BUILD
     COMMAND ${CMAKE_COMMAND} -E copy_if_different
-        "$<TARGET_FILE:marry>"
-        "${CMAKE_CURRENT_SOURCE_DIR}/bin/marry.dll"
-    COMMENT "复制 marry.dll 到 bin/ 根目录"
+        "$<TARGET_FILE:pingpang>"
+        "${CMAKE_CURRENT_SOURCE_DIR}/main/bin/$<TARGET_FILE_NAME:pingpang>"
+    COMMENT "复制 pingpang.dll 到 main/bin/ 根目录"
 )
diff --git a/bin/Release/marry.dll b/bin/Release/marry.dll
new file mode 100644
index 0000000..081aad4
Binary files /dev/null and b/bin/Release/marry.dll differ
diff --git a/bin/Release/marry.exp b/bin/Release/marry.exp
new file mode 100644
index 0000000..03b22b0
Binary files /dev/null and b/bin/Release/marry.exp differ
diff --git a/bin/Release/marry.lib b/bin/Release/marry.lib
new file mode 100644
index 0000000..1e3994b
Binary files /dev/null and b/bin/Release/marry.lib differ
diff --git a/bin/marry.dll b/bin/marry.dll
new file mode 100644
index 0000000..081aad4
Binary files /dev/null and b/bin/marry.dll differ
diff --git a/build-marry.bat b/build-pingpang.bat
similarity index 93%
rename from build-marry.bat
rename to build-pingpang.bat
index 4d4a2b5..dea161b 100644
--- a/build-marry.bat
+++ b/build-pingpang.bat
@@ -6,4 +6,4 @@ echo === CMake Configure (VS 2026) ===
 echo === Build ===
 "D:\Visual Studio\IDE\Common7\IDE\CommonExtensions\Microsoft\CMake\CMake\bin\cmake.exe" --build build --config Release
 echo === Result ===
-dir E:\newgame\marry\bin
+dir E:\newgame\marry\main\bin
diff --git a/build_output.txt b/build_output.txt
new file mode 100644
index 0000000..0f5c296
--- /dev/null
+++ b/build_output.txt
@@ -0,0 +1,9 @@
+适用于 .NET Framework MSBuild 版本 18.5.4+cb4e32d21
+
+  Checking File Globs
+  godot-cpp.vcxproj -> E:\newgame\marry\build\bin\libgodot-cpp.windows.template_debug.x86_64.lib
+  pingpong_ball.cpp
+    正在创建库 E:/newgame/marry/main/bin/Release/pingpang.lib 和对象 E:/newgame/marry/main/bin/Release/pingpang.exp
+  pingpang.vcxproj -> E:\newgame\marry\main\bin\Release\pingpang.dll
+  复制 pingpang.dll 到 main/bin/ 根目录
+  Building Custom Rule E:/newgame/marry/CMakeLists.txt
diff --git a/main/pingpang.gdextension b/main/pingpang.gdextension
new file mode 100644
index 0000000..439531c
--- /dev/null
+++ b/main/pingpang.gdextension
@@ -0,0 +1,8 @@
+[configuration]
+entry_symbol = "pingpang_library_init"
+compatibility_minimum = "4.5"
+
+[libraries]
+windows.x86_64 = "res://bin/pingpang.dll"
+linux.x86_64 = "res://bin/libpingpang.so"
+macos.universal = "res://bin/libpingpang.dylib"
diff --git a/main/project.godot b/main/project.godot
index a34766d..5b9d403 100644
--- a/main/project.godot
+++ b/main/project.godot
@@ -10,14 +10,16 @@ config_version=5
 
 [application]
 
-config/name="main"
+config/name="Pingpang"
 config/features=PackedStringArray("4.6", "Forward Plus")
 config/icon="res://icon.svg"
 
+run/main_scene="res://scenes/main.tscn"
+
 [physics]
 
-3d/physics_engine="Jolt Physics"
+common/enable_2d_physics=true
 
 [rendering]
 
-rendering_device/driver.windows="d3d12"
+renderer/rendering_method="forward_plus"
diff --git a/main/scenes/main.tscn b/main/scenes/main.tscn
new file mode 100644
index 0000000..1aff08a
--- /dev/null
+++ b/main/scenes/main.tscn
@@ -0,0 +1,59 @@
+[gd_scene load_steps=4 format=3]
+
+[sub_resource type="CircleShape2D" id="circle_ball"]
+radius = 12.0
+
+[sub_resource type="RectangleShape2D" id="rect_paddle"]
+size = Vector2(20.0, 120.0)
+
+[node name="Game" type="PingPongGame"]
+
+[node name="Ball" type="PingPongBall" parent="Game"]
+position = Vector2(576.0, 324.0)
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Game/Ball"]
+shape = SubResource("circle_ball")
+
+[node name="LeftPaddle" type="PingPongPaddle" parent="Game"]
+position = Vector2(50.0, 324.0)
+is_player = true
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Game/LeftPaddle"]
+shape = SubResource("rect_paddle")
+
+[node name="RightPaddle" type="PingPongPaddle" parent="Game"]
+position = Vector2(1102.0, 324.0)
+is_player = false
+ball_path = NodePath("../Ball")
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="Game/RightPaddle"]
+shape = SubResource("rect_paddle")
+
+[node name="UI" type="CanvasLayer" parent="Game"]
+
+[node name="LeftScore" type="Label" parent="Game/UI"]
+offset_left = 200.0
+offset_top = 20.0
+offset_right = 400.0
+offset_bottom = 70.0
+text = "0"
+horizontal_alignment = 1
+theme_override_font_sizes/font_size = 48
+theme_override_colors/font_color = Color(1.0, 1.0, 1.0, 1.0)
+
+[node name="RightScore" type="Label" parent="Game/UI"]
+offset_left = 752.0
+offset_top = 20.0
+offset_right = 952.0
+offset_bottom = 70.0
+text = "0"
+horizontal_alignment = 1
+theme_override_font_sizes/font_size = 48
+theme_override_colors/font_color = Color(1.0, 1.0, 1.0, 1.0)
+
+[node name="CenterLine" type="ColorRect" parent="Game/UI"]
+offset_left = 574.0
+offset_top = 0.0
+offset_right = 578.0
+offset_bottom = 648.0
+color = Color(1.0, 1.0, 1.0, 0.1)
diff --git a/marry.gdextension b/marry.gdextension
deleted file mode 100644
index bd40da4..0000000
--- a/marry.gdextension
+++ /dev/null
@@ -1,8 +0,0 @@
-[configuration]
-entry_symbol = "marry_library_init"
-compatibility_minimum = "4.5"
-
-[libraries]
-windows.x86_64 = "res://bin/marry.dll"
-linux.x86_64 = "res://bin/libmarry.so"
-macos.universal = "res://bin/libmarry.dylib"
diff --git a/project.godot b/project.godot
deleted file mode 100644
index 46cb952..0000000
--- a/project.godot
+++ /dev/null
@@ -1,23 +0,0 @@
-; Engine configuration file.
-; It's best edited using the editor UI and not directly,
-; since the parameters that go here are not all obvious.
-;
-; Format:
-;   [section] ; section goes between []
-;   param=value ; assign values to parameters
-
-config_version=5
-
-[application]
-
-config/name="新建游戏项目"
-config/features=PackedStringArray("4.6", "Forward Plus")
-config/icon="res://icon.svg"
-
-[physics]
-
-3d/physics_engine="Jolt Physics"
-
-[rendering]
-
-rendering_device/driver.windows="d3d12"
diff --git a/src/example.cpp b/src/example.cpp
deleted file mode 100644
index ef7353d..0000000
--- a/src/example.cpp
+++ /dev/null
@@ -1,22 +0,0 @@
-#include "example.h"
-
-#include <godot_cpp/core/class_db.hpp>
-#include <godot_cpp/core/defs.hpp>
-#include <godot_cpp/godot.hpp>
-
-using namespace godot;
-
-void MyMath::_bind_methods() {
-    // 把 C++ 方法注册给 GDScript 调用
-    ClassDB::bind_method(D_METHOD("add", "a", "b"), &MyMath::add);
-}
-
-MyMath::MyMath() {
-}
-
-MyMath::~MyMath() {
-}
-
-int MyMath::add(int a, int b) {
-    return a + b;
-}
diff --git a/src/example.h b/src/example.h
deleted file mode 100644
index f1594aa..0000000
--- a/src/example.h
+++ /dev/null
@@ -1,26 +0,0 @@
-#ifndef MARRY_EXAMPLE_H
-#define MARRY_EXAMPLE_H
-
-#include <godot_cpp/classes/ref_counted.hpp>
-
-namespace godot {
-
-// 示例 C++ 类：在 GDScript 里可以直接用 MyMath.new() 创建
-// 之后把你的 C++ 逻辑类都加在这里
-class MyMath : public RefCounted {
-    GDCLASS(MyMath, RefCounted)
-
-protected:
-    static void _bind_methods();
-
-public:
-    MyMath();
-    ~MyMath();
-
-    // 示例方法：加法（GDScript 调用: m.add(3, 4) -> 7）
-    int add(int a, int b);
-};
-
-}
-
-#endif // MARRY_EXAMPLE_H
diff --git a/src/pingpong_ball.cpp b/src/pingpong_ball.cpp
new file mode 100644
index 0000000..24050a5
--- /dev/null
+++ b/src/pingpong_ball.cpp
@@ -0,0 +1,136 @@
+#include "pingpong_ball.h"
+
+#include <godot_cpp/core/class_db.hpp>
+#include <godot_cpp/variant/utility_functions.hpp>
+#include <godot_cpp/classes/engine.hpp>
+#include <godot_cpp/classes/kinematic_collision2d.hpp>
+#include <godot_cpp/classes/node2d.hpp>
+#include <godot_cpp/classes/viewport.hpp>
+#include <godot_cpp/classes/window.hpp>
+#include <godot_cpp/classes/scene_tree.hpp>
+
+using namespace godot;
+
+void PingPongBall::_bind_methods() {
+    // 属性
+    ClassDB::bind_method(D_METHOD("get_speed"), &PingPongBall::get_speed);
+    ClassDB::bind_method(D_METHOD("set_speed", "value"), &PingPongBall::set_speed);
+    ClassDB::add_property("PingPongBall", PropertyInfo(Variant::FLOAT, "speed"), "set_speed", "get_speed");
+
+    // 方法
+    ClassDB::bind_method(D_METHOD("reset"), &PingPongBall::reset);
+
+    // 信号
+    ADD_SIGNAL(MethodInfo("scored", PropertyInfo(Variant::INT, "which")));
+}
+
+PingPongBall::PingPongBall() {
+    speed = 400.0f;
+}
+
+PingPongBall::~PingPongBall() {
+}
+
+void PingPongBall::_ready() {
+    reset();
+}
+
+void PingPongBall::_draw() {
+    // 画一个白色圆形表示球
+    draw_circle(Vector2(0.0f, 0.0f), 12.0f, Color(1.0f, 1.0f, 1.0f));
+}
+
+void PingPongBall::_physics_process(double delta) {
+    queue_redraw();
+    Vector2 velocity = direction * speed * (float)delta;
+
+    Ref<KinematicCollision2D> collision = move_and_collide(velocity);
+
+    if (collision.is_valid()) {
+        // 计算反弹方向
+        Vector2 normal = collision->get_normal();
+        direction = direction.bounce(normal);
+
+        // 根据碰撞法线判断碰撞对象类型
+        // 法线主要水平 → 碰到球拍（左右反弹）
+        // 法线主要垂直 → 碰到上下墙（上下反弹）
+        // 如果法线接近水平且球已经接近左右边界 → 得分
+        Object *collider = collision->get_collider();
+        if (collider) {
+            Node *collider_node = Object::cast_to<Node>(collider);
+            if (collider_node) {
+                StringName node_name = collider_node->get_name();
+                // 判断是不是球拍（球拍名字包含 "Paddle"）
+                if (node_name.find("Paddle") != -1) {
+                    // 碰到球拍，微调角度（根据击中位置）
+                    Node2D *collider_2d = Object::cast_to<Node2D>(collider_node);
+                    if (collider_2d) {
+                        float hit_offset = (get_global_position().y - collider_2d->get_global_position().y) / 60.0f;
+                        hit_offset = CLAMP(hit_offset, -1.0f, 1.0f);
+                        direction.y += hit_offset * 0.5f;
+                        direction = direction.normalized();
+                    }
+                }
+            }
+        }
+
+        // 确保方向始终有效
+        direction = direction.normalized();
+    }
+
+    // 检测是否出界（得分判定）
+    Viewport *viewport = get_viewport();
+    if (viewport) {
+        Vector2 screen_size = viewport->get_visible_rect().size;
+        Vector2 pos = get_global_position();
+
+        if (pos.x < -50.0f) {
+            // 球从左边出界，右边得分
+            emit_signal("scored", 1);
+            reset();
+        } else if (pos.x > screen_size.x + 50.0f) {
+            // 球从右边出界，左边得分
+            emit_signal("scored", 0);
+            reset();
+        }
+
+        // Y 方向边界限制（防止飞出屏幕）
+        if (pos.y < 0.0f) {
+            set_global_position(Vector2(pos.x, 0.0f));
+            direction.y = std::abs(direction.y);
+        } else if (pos.y > screen_size.y) {
+            set_global_position(Vector2(pos.x, screen_size.y));
+            direction.y = -std::abs(direction.y);
+        }
+    }
+}
+
+void PingPongBall::reset() {
+    // 回到屏幕中央
+    Viewport *viewport = get_viewport();
+    if (viewport) {
+        Vector2 screen_size = viewport->get_visible_rect().size;
+        set_global_position(screen_size / 2.0f);
+    } else {
+        set_global_position(Vector2(640.0f, 360.0f));
+    }
+
+    // 随机方向（-45° 到 45° 之间，向左或向右随机）
+    float angle = (UtilityFunctions::randf() - 0.5f) * Math_PI / 2.0f;  // -45° ~ 45°
+    int side = (UtilityFunctions::randf() > 0.5f) ? 1 : -1;
+    direction = Vector2((float)side * std::cos(angle), std::sin(angle)).normalized();
+
+    // 确保水平分量足够（避免球过于垂直）
+    if (std::abs(direction.x) < 0.3f) {
+        direction.x = (direction.x > 0 ? 1.0f : -1.0f) * 0.3f;
+        direction = direction.normalized();
+    }
+}
+
+void PingPongBall::set_speed(float p_speed) {
+    speed = p_speed;
+}
+
+float PingPongBall::get_speed() const {
+    return speed;
+}
diff --git a/src/pingpong_ball.h b/src/pingpong_ball.h
new file mode 100644
index 0000000..bde96c4
--- /dev/null
+++ b/src/pingpong_ball.h
@@ -0,0 +1,38 @@
+#ifndef PINGPONG_BALL_H
+#define PINGPONG_BALL_H
+
+#include <godot_cpp/classes/character_body2d.hpp>
+
+namespace godot {
+
+class PingPongBall : public CharacterBody2D {
+    GDCLASS(PingPongBall, CharacterBody2D)
+
+private:
+    float speed = 300.0f;
+    Vector2 direction = Vector2(1.0f, 0.0f);
+
+protected:
+    static void _bind_methods();
+
+public:
+    PingPongBall();
+    ~PingPongBall();
+
+    void _physics_process(double delta) override;
+    void _ready() override;
+    void _draw() override;
+
+    // 重置球到屏幕中央，以随机角度发射
+    void reset();
+
+    // 属性 getter/setter
+    void set_speed(float p_speed);
+    float get_speed() const;
+
+    // 信号: scored(int which) — 0=左边得分, 1=右边得分
+};
+
+}
+
+#endif // PINGPONG_BALL_H
diff --git a/src/pingpong_game.cpp b/src/pingpong_game.cpp
new file mode 100644
index 0000000..9316ec2
--- /dev/null
+++ b/src/pingpong_game.cpp
@@ -0,0 +1,114 @@
+#include "pingpong_game.h"
+#include "pingpong_ball.h"
+
+#include <godot_cpp/core/class_db.hpp>
+#include <godot_cpp/variant/utility_functions.hpp>
+#include <godot_cpp/classes/engine.hpp>
+#include <godot_cpp/classes/scene_tree.hpp>
+
+using namespace godot;
+
+void PingPongGame::_bind_methods() {
+    // 属性
+    ClassDB::bind_method(D_METHOD("get_left_score"), &PingPongGame::get_left_score);
+    ClassDB::bind_method(D_METHOD("set_left_score", "value"), &PingPongGame::set_left_score);
+    ClassDB::add_property("PingPongGame", PropertyInfo(Variant::INT, "left_score"), "set_left_score", "get_left_score");
+
+    ClassDB::bind_method(D_METHOD("get_right_score"), &PingPongGame::get_right_score);
+    ClassDB::bind_method(D_METHOD("set_right_score", "value"), &PingPongGame::set_right_score);
+    ClassDB::add_property("PingPongGame", PropertyInfo(Variant::INT, "right_score"), "set_right_score", "get_right_score");
+
+    ClassDB::bind_method(D_METHOD("get_max_score"), &PingPongGame::get_max_score);
+    ClassDB::bind_method(D_METHOD("set_max_score", "value"), &PingPongGame::set_max_score);
+    ClassDB::add_property("PingPongGame", PropertyInfo(Variant::INT, "max_score"), "set_max_score", "get_max_score");
+
+    // 方法
+    ClassDB::bind_method(D_METHOD("reset_game"), &PingPongGame::reset_game);
+    ClassDB::bind_method(D_METHOD("_on_ball_scored", "which"), &PingPongGame::_on_ball_scored);
+
+    // 信号
+    ADD_SIGNAL(MethodInfo("game_over", PropertyInfo(Variant::INT, "winner")));
+}
+
+PingPongGame::PingPongGame() {
+    left_score = 0;
+    right_score = 0;
+    max_score = 5;
+}
+
+PingPongGame::~PingPongGame() {
+}
+
+void PingPongGame::_ready() {
+    // 查找比分 Label
+    left_score_label = Object::cast_to<Label>(get_node_or_null("UI/LeftScore"));
+    right_score_label = Object::cast_to<Label>(get_node_or_null("UI/RightScore"));
+
+    // 连接球的得分信号
+    PingPongBall *ball = Object::cast_to<PingPongBall>(get_node_or_null("Ball"));
+    if (ball) {
+        ball->connect("scored", Callable(this, "_on_ball_scored"));
+    }
+
+    update_score_display();
+}
+
+void PingPongGame::_on_ball_scored(int which) {
+    if (which == 0) {
+        // 左边得分
+        right_score++;
+    } else {
+        // 右边得分
+        left_score++;
+    }
+
+    update_score_display();
+
+    // 检查是否有人获胜
+    if (left_score >= max_score) {
+        emit_signal("game_over", 0);
+    } else if (right_score >= max_score) {
+        emit_signal("game_over", 1);
+    }
+}
+
+void PingPongGame::reset_game() {
+    left_score = 0;
+    right_score = 0;
+    update_score_display();
+}
+
+void PingPongGame::update_score_display() {
+    if (left_score_label) {
+        left_score_label->set_text(String::num_int64(left_score));
+    }
+    if (right_score_label) {
+        right_score_label->set_text(String::num_int64(right_score));
+    }
+}
+
+void PingPongGame::set_left_score(int p_score) {
+    left_score = p_score;
+    update_score_display();
+}
+
+int PingPongGame::get_left_score() const {
+    return left_score;
+}
+
+void PingPongGame::set_right_score(int p_score) {
+    right_score = p_score;
+    update_score_display();
+}
+
+int PingPongGame::get_right_score() const {
+    return right_score;
+}
+
+void PingPongGame::set_max_score(int p_score) {
+    max_score = p_score;
+}
+
+int PingPongGame::get_max_score() const {
+    return max_score;
+}
diff --git a/src/pingpong_game.h b/src/pingpong_game.h
new file mode 100644
index 0000000..0e00b45
--- /dev/null
+++ b/src/pingpong_game.h
@@ -0,0 +1,52 @@
+#ifndef PINGPONG_GAME_H
+#define PINGPONG_GAME_H
+
+#include <godot_cpp/classes/node2d.hpp>
+#include <godot_cpp/classes/label.hpp>
+
+namespace godot {
+
+class PingPongGame : public Node2D {
+    GDCLASS(PingPongGame, Node2D)
+
+private:
+    int left_score = 0;
+    int right_score = 0;
+    int max_score = 5;
+
+    Label *left_score_label = nullptr;
+    Label *right_score_label = nullptr;
+
+    void update_score_display();
+
+protected:
+    static void _bind_methods();
+
+public:
+    PingPongGame();
+    ~PingPongGame();
+
+    void _ready() override;
+
+    // 得分处理
+    void _on_ball_scored(int which);
+
+    // 重置整局游戏
+    void reset_game();
+
+    // 属性 getter/setter
+    void set_left_score(int p_score);
+    int get_left_score() const;
+
+    void set_right_score(int p_score);
+    int get_right_score() const;
+
+    void set_max_score(int p_score);
+    int get_max_score() const;
+
+    // 信号: game_over(int winner) — 0=左边赢, 1=右边赢
+};
+
+}
+
+#endif // PINGPONG_GAME_H
diff --git a/src/pingpong_paddle.cpp b/src/pingpong_paddle.cpp
new file mode 100644
index 0000000..f649f27
--- /dev/null
+++ b/src/pingpong_paddle.cpp
@@ -0,0 +1,110 @@
+#include "pingpong_paddle.h"
+
+#include <godot_cpp/core/class_db.hpp>
+#include <godot_cpp/classes/input.hpp>
+#include <godot_cpp/classes/engine.hpp>
+#include <godot_cpp/classes/node.hpp>
+#include <godot_cpp/classes/scene_tree.hpp>
+#include <godot_cpp/classes/viewport.hpp>
+
+using namespace godot;
+
+void PingPongPaddle::_bind_methods() {
+    // 属性
+    ClassDB::bind_method(D_METHOD("get_speed"), &PingPongPaddle::get_speed);
+    ClassDB::bind_method(D_METHOD("set_speed", "value"), &PingPongPaddle::set_speed);
+    ClassDB::add_property("PingPongPaddle", PropertyInfo(Variant::FLOAT, "speed"), "set_speed", "get_speed");
+
+    ClassDB::bind_method(D_METHOD("get_is_player"), &PingPongPaddle::get_is_player);
+    ClassDB::bind_method(D_METHOD("set_is_player", "value"), &PingPongPaddle::set_is_player);
+    ClassDB::add_property("PingPongPaddle", PropertyInfo(Variant::BOOL, "is_player"), "set_is_player", "get_is_player");
+
+    ClassDB::bind_method(D_METHOD("get_ball_path"), &PingPongPaddle::get_ball_path);
+    ClassDB::bind_method(D_METHOD("set_ball_path", "value"), &PingPongPaddle::set_ball_path);
+    ClassDB::add_property("PingPongPaddle", PropertyInfo(Variant::NODE_PATH, "ball_path"), "set_ball_path", "get_ball_path");
+}
+
+PingPongPaddle::PingPongPaddle() {
+    speed = 350.0f;
+    is_player = true;
+}
+
+PingPongPaddle::~PingPongPaddle() {
+}
+
+void PingPongPaddle::_draw() {
+    // 画一个白色矩形表示球拍
+    draw_rect(Rect2(Vector2(-10.0f, -60.0f), Vector2(20.0f, 120.0f)), Color(1.0f, 1.0f, 1.0f));
+}
+
+void PingPongPaddle::_physics_process(double delta) {
+    queue_redraw();
+    float move_amount = 0.0f;
+
+    if (is_player) {
+        // 玩家控制：读取上下输入
+        Input *input = Input::get_singleton();
+        if (input->is_action_pressed("ui_up")) {
+            move_amount = -1.0f;
+        } else if (input->is_action_pressed("ui_down")) {
+            move_amount = 1.0f;
+        }
+    } else {
+        // AI 控制：追踪球的位置
+        if (!ball_path.is_empty()) {
+            Node *node = get_node_or_null(ball_path);
+            if (node) {
+                Node2D *ball = Object::cast_to<Node2D>(node);
+                if (ball) {
+                    float ball_y = ball->get_global_position().y;
+                    float paddle_y = get_global_position().y;
+                    if (ball_y < paddle_y - 20.0f) {
+                        move_amount = -1.0f;
+                    } else if (ball_y > paddle_y + 20.0f) {
+                        move_amount = 1.0f;
+                    }
+                }
+            }
+        }
+    }
+
+    // 移动
+    Vector2 velocity = Vector2(0.0f, move_amount * speed * (float)delta);
+    move_and_collide(velocity);
+
+    // 限制移动范围（不超出屏幕）
+    Viewport *viewport = get_viewport();
+    if (viewport) {
+        Vector2 screen_size = viewport->get_visible_rect().size;
+        Vector2 pos = get_global_position();
+        if (pos.y < half_height) {
+            set_global_position(Vector2(pos.x, half_height));
+        } else if (pos.y > screen_size.y - half_height) {
+            set_global_position(Vector2(pos.x, screen_size.y - half_height));
+        }
+    }
+}
+
+void PingPongPaddle::set_speed(float p_speed) {
+    speed = p_speed;
+}
+
+float PingPongPaddle::get_speed() const {
+    return speed;
+}
+
+void PingPongPaddle::set_is_player(bool p_is_player) {
+    is_player = p_is_player;
+}
+
+bool PingPongPaddle::get_is_player() const {
+    return is_player;
+}
+
+void PingPongPaddle::set_ball_path(const NodePath &p_path) {
+    ball_path = p_path;
+}
+
+NodePath PingPongPaddle::get_ball_path() const {
+    return ball_path;
+}
diff --git a/src/pingpong_paddle.h b/src/pingpong_paddle.h
new file mode 100644
index 0000000..c8c64ef
--- /dev/null
+++ b/src/pingpong_paddle.h
@@ -0,0 +1,40 @@
+#ifndef PINGPONG_PADDLE_H
+#define PINGPONG_PADDLE_H
+
+#include <godot_cpp/classes/character_body2d.hpp>
+
+namespace godot {
+
+class PingPongPaddle : public CharacterBody2D {
+    GDCLASS(PingPongPaddle, CharacterBody2D)
+
+private:
+    float speed = 350.0f;
+    bool is_player = true;
+    NodePath ball_path;
+    float half_height = 60.0f;  // 球拍半高，用于限制移动范围
+
+protected:
+    static void _bind_methods();
+
+public:
+    PingPongPaddle();
+    ~PingPongPaddle();
+
+    void _physics_process(double delta) override;
+    void _draw() override;
+
+    // 属性 getter/setter
+    void set_speed(float p_speed);
+    float get_speed() const;
+
+    void set_is_player(bool p_is_player);
+    bool get_is_player() const;
+
+    void set_ball_path(const NodePath &p_path);
+    NodePath get_ball_path() const;
+};
+
+}
+
+#endif // PINGPONG_PADDLE_H
diff --git a/src/register_types.cpp b/src/register_types.cpp
index 02a11a1..ecb9e2a 100644
--- a/src/register_types.cpp
+++ b/src/register_types.cpp
@@ -1,6 +1,8 @@
 #include "register_types.h"
 
-#include "example.h"
+#include "pingpong_ball.h"
+#include "pingpong_paddle.h"
+#include "pingpong_game.h"
 
 #include <godot_cpp/core/class_db.hpp>
 #include <godot_cpp/core/defs.hpp>
@@ -8,29 +10,34 @@
 
 using namespace godot;
 
-void initialize_marry_module(ModuleInitializationLevel p_level) {
+void initialize_pingpang_module(ModuleInitializationLevel p_level) {
     if (p_level != MODULE_INITIALIZATION_LEVEL_SCENE) {
         return;
     }
-    // 在这里注册所有 C++ 类
-    GDREGISTER_CLASS(MyMath);
+    // 注册所有游戏类
+    GDREGISTER_CLASS(PingPongBall);
+    GDREGISTER_CLASS(PingPongPaddle);
+    GDREGISTER_CLASS(PingPongGame);
 }
 
-void uninitialize_marry_module(ModuleInitializationLevel p_level) {
+void uninitialize_pingpang_module(ModuleInitializationLevel p_level) {
     if (p_level != MODULE_INITIALIZATION_LEVEL_SCENE) {
         return;
     }
-    // godot-cpp 在库卸载时自动清理类，无需手动注销
+    // godot-cpp 在库卸载时自动清理类
 }
 
 // Godot 加载扩展的入口（dll 导出符号）
 extern "C" {
-// Initialization.
-GDExtensionBool GDE_EXPORT marry_library_init(GDExtensionInterfaceGetProcAddress p_get_proc_address, GDExtensionClassLibraryPtr p_library, GDExtensionInitialization *r_initialization) {
+GDExtensionBool GDE_EXPORT pingpang_library_init(
+    GDExtensionInterfaceGetProcAddress p_get_proc_address,
+    GDExtensionClassLibraryPtr p_library,
+    GDExtensionInitialization *r_initialization
+) {
     godot::GDExtensionBinding::InitObject init_obj(p_get_proc_address, p_library, r_initialization);
 
-    init_obj.register_initializer(initialize_marry_module);
-    init_obj.register_terminator(uninitialize_marry_module);
+    init_obj.register_initializer(initialize_pingpang_module);
+    init_obj.register_terminator(uninitialize_pingpang_module);
     init_obj.set_minimum_library_initialization_level(MODULE_INITIALIZATION_LEVEL_SCENE);
 
     return init_obj.init();
diff --git a/src/register_types.h b/src/register_types.h
index 22d12ce..5308dcf 100644
--- a/src/register_types.h
+++ b/src/register_types.h
@@ -1,11 +1,11 @@
-#ifndef MARRY_REGISTER_TYPES_H
-#define MARRY_REGISTER_TYPES_H
+#ifndef PINGPANG_REGISTER_TYPES_H
+#define PINGPANG_REGISTER_TYPES_H
 
 #include <godot_cpp/core/class_db.hpp>
 
 using namespace godot;
 
-void initialize_marry_module(ModuleInitializationLevel p_level);
-void uninitialize_marry_module(ModuleInitializationLevel p_level);
+void initialize_pingpang_module(ModuleInitializationLevel p_level);
+void uninitialize_pingpang_module(ModuleInitializationLevel p_level);
 
-#endif // MARRY_REGISTER_TYPES_H
+#endif // PINGPANG_REGISTER_TYPES_H