用c++帮我写个2d射击游戏

以下是一个简单的C++ 2D射击游戏的示例代码：

#include <iostream>
#include <conio.h>
#include <Windows.h>

using namespace std;

const int WIDTH = 20;
const int HEIGHT = 20;

int playerX, playerY;
int bulletX, bulletY;
int enemyX, enemyY;
bool isBulletActive;

void Setup()
{
    playerX = WIDTH / 2;
    playerY = HEIGHT - 1;
    bulletX = playerX;
    bulletY = playerY;
    enemyX = rand() % WIDTH;
    enemyY = 0;
    isBulletActive = false;
}

void Draw()
{
    system("cls");

    for (int i = 0; i < WIDTH + 2; i++)
        cout << "#";
    cout << endl;

    for (int i = 0; i < HEIGHT; i++)
    {
        for (int j = 0; j < WIDTH; j++)
        {
            if (j == 0)
                cout << "#";

            if (i == playerY && j == playerX)
                cout << "P";
            else if (i == bulletY && j == bulletX)
                cout << "*";
            else if (i == enemyY && j == enemyX)
                cout << "E";
            else
                cout << " ";

            if (j == WIDTH - 1)
                cout << "#";
        }
        cout << endl;
    }

    for (int i = 0; i < WIDTH + 2; i++)
        cout << "#";
    cout << endl;
}

void Input()
{
    if (_kbhit())
    {
        switch (_getch())
        {
        case 'a':
            playerX--;
            break;
        case 'd':
            playerX++;
            break;
        case ' ':
            if (!isBulletActive)
            {
                isBulletActive = true;
                bulletX = playerX;
                bulletY = playerY;
            }
            break;
        case 'x':
            exit(0);
            break;
        }
    }
}

void Logic()
{
    if (isBulletActive)
    {
        bulletY--;
        if (bulletY < 0)
            isBulletActive = false;
    }

    enemyY++;
    if (enemyY >= HEIGHT)
    {
        enemyX = rand() % WIDTH;
        enemyY = 0;
    }

    if (bulletX == enemyX && bulletY == enemyY)
    {
        isBulletActive = false;
        enemyX = rand() % WIDTH;
        enemyY = 0;
    }

    if (playerX < 0)
        playerX = 0;
    else if (playerX >= WIDTH)
        playerX = WIDTH - 1;
}

int main()
{
    Setup();

    while (true)
    {
        Draw();
        Input();
        Logic();
        Sleep(50); // 控制游戏速度
    }

    return 0;
}

这是一个简单的2D射击游戏，玩家通过键盘上的字母'a'和'd'控制玩家的水平移动，按空格键发射子弹。游戏中有一个敌人，玩家需要射击敌人以获得得分。敌人每次到达屏幕底部后会重新生成在屏幕顶部