Add project files.

include/game.h

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+#pragma once
+
+#include <raylib.h>
+#include <string>
+#include <vector>
+
+// Game States & Configurations
+enum class GameState {
+    MainMenu,
+    Playing,
+    Paused,
+    GameOver
+};
+
+enum class Difficulty {
+    Easy,
+    Normal,
+    Hard
+};
+
+constexpr float CPU_SPEED_EASY = 3.0f;
+constexpr float CPU_SPEED_NORMAL = 5.5f;
+constexpr float CPU_SPEED_HARD = 8.0f;
+
+// --- Base Entities ---
+
+class GameObject {
+public:
+    Vector2 position;
+    Color color;
+
+public:
+    GameObject(Vector2 pos, Color c) : position(pos), color(c) {}
+    virtual ~GameObject() = default;
+
+    virtual void Update() = 0;
+    virtual void Draw() = 0;
+};
+
+// --- Game Objects ---
+
+class Paddle : public GameObject {
+public:
+    float width;
+    float height;
+
+    Paddle(Vector2 pos, Color c, float w, float h)
+        : GameObject(pos, c), width(w), height(h) {
+    }
+
+    void Update() override;
+    void Draw() override;
+};
+
+class Ball : public GameObject {
+public:
+    float radius;
+    Vector2 velocity;
+
+    Ball(Vector2 pos, Color c, float r)
+        : GameObject(pos, c), radius(r), velocity({ 5.0f, 5.0f }) {
+    }
+
+    void Update() override;
+    void Draw() override;
+};
+
+class CpuPaddle : public Paddle {
+private:
+    float speed;
+    Difficulty currentDifficulty;
+
+public:
+    CpuPaddle(Vector2 pos, Color c, float w, float h, Difficulty diff = Difficulty::Normal)
+        : Paddle(pos, c, w, h) {
+        SetDifficulty(diff);
+    }
+
+    void SetDifficulty(Difficulty diff) {
+        currentDifficulty = diff;
+        switch (currentDifficulty) {
+        case Difficulty::Easy:   speed = CPU_SPEED_EASY; break;
+        case Difficulty::Normal: speed = CPU_SPEED_NORMAL; break;
+        case Difficulty::Hard:   speed = CPU_SPEED_HARD; break;
+        }
+    }
+
+    void Update(float ball_y) {
+        float paddleCenter = position.y + (height / 2.0f);
+
+        if (paddleCenter > ball_y + speed) {
+            position.y -= speed;
+        }
+        else if (paddleCenter < ball_y - speed) {
+            position.y += speed;
+        }
+
+        LimitMovement();
+    }
+
+    void Update() override {}
+
+    void LimitMovement() {
+        if (position.y <= 0) {
+            position.y = 0;
+        }
+        if (position.y + height >= GetScreenHeight()) {
+            position.y = GetScreenHeight() - height;
+        }
+    }
+};

include/menu.h

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+#pragma once
+#include "game.h" 
+#include <string>
+#include <vector>
+
+// --- UI / Systems ---
+
+class Menu {
+private:
+    std::string title;
+    std::vector<std::string> options;
+    int selectedIndex;
+
+public:
+    Menu(std::string menuTitle, std::vector<std::string> menuOptions)
+        : title(menuTitle), options(menuOptions), selectedIndex(0) {
+    }
+
+    void Update(GameState& currentState);
+    void Draw();
+};