Car Racing Game Win32 (Preliminary)

#include <Windows.h>
#include <ctime>
#include <cstdlib>
#include <stdio.h>

// Global Variables
const int WIDTH = 1366;
const int HEIGHT = 768;
const int ROAD_WIDTH = 200;
const int CAR_WIDTH = 50;
const int CAR_HEIGHT = 100;
const int TYRE_SIZE = 10;
const int FPS = 60;
const int TIMER = 4;

int playerX = 100;
int playerY = HEIGHT - CAR_HEIGHT - 50;
int aiX = playerX + CAR_WIDTH + 20;
int aiY = playerY;
int speed = 5;
int aiSpeed = 5;
int timer = TIMER;
int playerTyre1X = playerX + 10;
int playerTyre1Y = playerY + CAR_HEIGHT - TYRE_SIZE;
int playerTyre2X = playerX + CAR_WIDTH - TYRE_SIZE - 10;
int playerTyre2Y = playerY + CAR_HEIGHT - TYRE_SIZE;
int aiTyre1X = aiX + 10;
int aiTyre1Y = aiY + CAR_HEIGHT - TYRE_SIZE;
int aiTyre2X = aiX + CAR_WIDTH - TYRE_SIZE - 10;
int aiTyre2Y = aiY + CAR_HEIGHT - TYRE_SIZE;

bool gameStarted = false;
bool gameOver = false;
bool playerWon = false;

// Window Procedure
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)
    {
    case WM_CREATE:
        SetTimer(hWnd, 1, 1000 / FPS, NULL);
        break;
    case WM_TIMER:
        if (timer > 0)
        {
            timer--;
            InvalidateRect(hWnd, NULL, TRUE);
        }
        else if (!gameStarted)
        {
            gameStarted = true;
            srand((unsigned int)time(0));
            aiSpeed = rand() % 5 + 3;
        }
        else if (!gameOver)
        {
            if (GetAsyncKeyState(VK_LEFT))
            {
                playerX -= speed;
                playerTyre1X -= speed;
                playerTyre2X -= speed;
            }
            if (GetAsyncKeyState(VK_RIGHT))
            {
                playerX += speed;
                playerTyre1X += speed;
                playerTyre2X += speed;
            }
            if (GetAsyncKeyState(VK_UP))
            {
                playerY -= speed;
                playerTyre1Y -= speed;
                playerTyre2Y -= speed;
            }
            if (GetAsyncKeyState(VK_DOWN))
            {
                playerY += speed;
                playerTyre1Y += speed;
                playerTyre2Y += speed;
            }
            aiY -= aiSpeed;
            aiTyre1Y -= aiSpeed;
            aiTyre2Y -= aiSpeed;
            if (aiY < 0)
            {
                gameOver = true;
                playerWon = false;
            }
            if (playerY < 0)
            {
                gameOver = true;
                playerWon = true;
            }
            InvalidateRect(hWnd, NULL, TRUE);
        }
        break;
    case WM_PAINT:
    {
        PAINTSTRUCT ps;
        HDC hdc = BeginPaint(hWnd, &ps);
        HBRUSH hBrush;
        HPEN hPen;
        // Draw road
        hBrush = CreateSolidBrush(RGB(0, 0, 0));
        hPen = CreatePen(PS_NULL, 0, RGB(0, 0, 0));
        SelectObject(hdc, hPen);
        SelectObject(hdc, hBrush);
        Rectangle(hdc, 0, HEIGHT / 2, ROAD_WIDTH, HEIGHT);
        Rectangle(hdc, 0, 0, WIDTH, HEIGHT / 2);
        DeleteObject(hPen);
        DeleteObject(hBrush);
        // Draw player car
        hBrush = CreateSolidBrush(RGB(255, 0, 0));
        hPen = CreatePen(PS_NULL, 0, RGB(255, 0, 0));
        SelectObject(hdc, hPen);
        SelectObject(hdc, hBrush);
        Rectangle(hdc, playerX, playerY, playerX + CAR_WIDTH, playerY + CAR_HEIGHT);
        DeleteObject(hPen);
        DeleteObject(hBrush);
        // Draw player tyres
        hBrush = CreateSolidBrush(RGB(255, 255, 255));
        hPen = CreatePen(PS_NULL, 0, RGB(255, 255, 255));
        SelectObject(hdc, hPen);
        SelectObject(hdc, hBrush);
        Ellipse(hdc, playerTyre1X, playerTyre1Y, playerTyre1X + TYRE_SIZE, playerTyre1Y + TYRE_SIZE);
        Ellipse(hdc, playerTyre2X, playerTyre2Y, playerTyre2X + TYRE_SIZE, playerTyre2Y + TYRE_SIZE);
        DeleteObject(hPen);
        DeleteObject(hBrush);
        // Draw AI car
        hBrush = CreateSolidBrush(RGB(0, 0, 255));
        hPen = CreatePen(PS_NULL, 0, RGB(0, 0, 255));
        SelectObject(hdc, hPen);
        SelectObject(hdc, hBrush);
        Rectangle(hdc, aiX, aiY, aiX + CAR_WIDTH, aiY + CAR_HEIGHT);
        DeleteObject(hPen);
        DeleteObject(hBrush);
        // Draw AI tyres
        hBrush = CreateSolidBrush(RGB(255, 255, 255));
        hPen = CreatePen(PS_NULL, 0, RGB(255, 255, 255));
        SelectObject(hdc, hPen);
        SelectObject(hdc, hBrush);
        Ellipse(hdc, aiTyre1X, aiTyre1Y, aiTyre1X + TYRE_SIZE, aiTyre1Y + TYRE_SIZE);
        Ellipse(hdc, aiTyre2X, aiTyre2Y, aiTyre2X + TYRE_SIZE, aiTyre2Y + TYRE_SIZE);
        DeleteObject(hPen);
        DeleteObject(hBrush);
        // Draw timer
        if (timer > 0)
        {
            wchar_t str[10];
            swprintf(str, 10, L"%d", timer);
            TextOut(hdc, WIDTH / 2 - 10, HEIGHT / 2, str, wcslen(str));
        }
        // Draw game over text
        if (gameOver)
        {
            if (playerWon)
            {
                TextOut(hdc, WIDTH / 2 - 50, HEIGHT / 2, L"You Win!", 7);
            }
            else
            {
                TextOut(hdc, WIDTH / 2 - 50, HEIGHT / 2, L"AI Wins!", 7);
            }
        }
        EndPaint(hWnd, &ps);
    }
    break;
    case WM_DESTROY:
        KillTimer(hWnd, 1);
        PostQuitMessage(0);
        break;
    default:
        return DefWindowProc(hWnd, message, wParam, lParam);
    }
    return 0;
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
    // Register window class
    WNDCLASSEX wc = { 0 };
    wc.cbSize = sizeof(WNDCLASSEX);
    wc.style = 0;
    wc.lpfnWndProc = WndProc;
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    wc.hInstance = hInstance;
    wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
    wc.lpszMenuName = NULL;
    wc.lpszClassName = L"RacingGame";
    wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
    RegisterClassEx(&wc);

    // Create window
    HWND hWnd = CreateWindowEx(0, L"RacingGame", L"Racing Game", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, WIDTH, HEIGHT, NULL, NULL, hInstance, NULL);

    // Show window
    ShowWindow(hWnd, nCmdShow);

    // Main loop
    MSG msg = { 0 };
    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    return 0;
}