error help

#include <iostream>
#include <Windows.h>
#include <conio.h>
using namespace std;








void gotoxy(int x, int y);
void setColour(int ink);
void setConsoleSize(int rows, int columns);

int main()
{

    int BULLET_SPEED  = 10;
int ENEMY_SPEED  = 50;

int cyan = 0x0B;
int white = 0x0F;
 int green = 0x0A;
 int red = 0x0C;


 int MAX_BULLETS = 30;


    int bulletX = 0;
    int bulletY = 0;
    int timer = BULLET_SPEED;
    bool Bulletalive = false;
    int numBullets = MAX_BULLETS;


    int enemyX = 3;
    int enemyY = 3;
    int enemyTimer = ENEMY_SPEED;
    int enemyAlive = true;
    char dirHorizontal = 'r';
    int hits = 0;
     char b = 232;
     char st = 153;
     char bt = 234;
     char slt = 2;
    char gm = 15;
    char em = 31;
    char el = 17;
    char er = 16;
    char ps  = 24;
    char pm = 6;
    char pmj = 194;
    char q, ch1;
    char a = 221, bi=219;
    char bu = 15;
    char ms;
    const int MenuState = 0;
    const int MenuPlay = 1;
   const int MenuHelp = 2;
const int MenuExit = 3;

    bool playing = true;
    char ch;

    int shipXPos = 39, shipYPos = 23;

    setConsoleSize(30, 89);

    system("title MAD SHOT");

      Beep(261,100);
  Beep(293,100);
   Beep(329,100);
  Beep(349,100);
  // this is just for the design, ignore it

cout<<"       ***********           ***********      999999999999999         000000000000\n";
Sleep(100);
   cout<<"       **** *******        *******  ****      999999999999999         00         00\n";
   Sleep(100);
   cout<<"       ****  ********      ******   ****      999         999         00          00\n";
   Sleep(100);
   cout<<"       ****    *******    *******   ****      999         999         00           00\n";
   Sleep(100);
   cout<<"       ****     *******  *******    ****      999         999         00            00\n";
   Sleep(100);
   cout<<"       ****      **************     ****      999         999         00             00\n";
   Sleep(100);
   cout<<"       ****         ********        ****      999         999         00             00\n";
   Sleep(100);
   cout<<"       ****          ******         ****      999         999         00             00\n";
   Sleep(100);
   cout<<"       ****                         ****      999         999         00             00\n";
   Sleep(100);
   cout<<"       ****                         ****      999         999         00             00\n";
   Sleep(100);
   cout<<"       ****                         ****      999         999         00             00\n";
   Sleep(100);
   cout<<"       ****                         ****      999         999         00             00\n";
   Sleep(100);
   cout<<"       ****                         ****      999         999         00            00\n";
   Sleep(100);
   cout<<"       ****                         ****      999         999         00           00\n";
   Sleep(100);
   cout<<"       ****                         ****      999         999         00          00\n";
   Sleep(100);
   cout<<"       ****                         ****      999         999         00         00\n";
   Sleep(100);
   cout<<"       ****                         ****      999999999999999         00        00\n";
   Sleep(100);
   cout<<"       ****                         ****      999999999999999         00000000000\n";

   cout<<"\n\n                                         PRESS ENTER TO PLAY";


   cin.ignore();
         for(q = 0; q<89; q++){
            cout<<a;
            Sleep(60);
         }
         system("CLS");

         // error starts from here

         MenuState ms=MenuPlay;
char ch7=0;
while (ch!='\r')
{
    switch (ms)
    {
        case MenuPlay:
            cout<<"--> PLAY\n    HELP\n    EXIT\n";
            break;
        case MenuHelp:
            cout<<"    PLAY\n--> HELP\n    EXIT\n";
            break;
        case MenuExit:
            cout<<"    PLAY\n    HELP\n--> EXIT\n";
            break;
        default:
            break;
            cout<<"ERROR: Unknown state!\n";
    }
    ch=getch();
    switch (ch)
    {
        case 'w':
        case 'W':
        ms=MenuPlay;
        break;
        case 'e':
        case 'E':
        ms=MenuHelp;
        break;
        case 'r':
        case 'R':
        ms=MenuExit;
        break;
        default:
            break;
    }
}
switch (ms)
{
    case MenuPlay:

            do
    {


        setColour(white);
        gotoxy(24, 0);
        cout << "Bullets Left: " << numBullets << "   Ship Hits: " << hits;



        setColour(green);
        gotoxy(0,1);
        cout<<"_________________________________________________________________________________________";

        setColour(green);
        gotoxy(0,25);
        cout<<"_________________________________________________________________________________________";





        if (_kbhit())
        {

            ch = _getch();

            switch (ch)
            {
            case 'w':
                shipXPos--;
                if (shipXPos < 0) shipXPos = 0;
                break;
            case 'e':
                shipXPos++;
                if (shipXPos > 81) shipXPos = 81;
                break;
            case ' ':
                if (!Bulletalive)
                {

                    bulletX = shipXPos + 1;
                    bulletY = shipYPos;
                    Bulletalive = true;
                    numBullets--;
                }
                break;
            }

            system("cls");
        }


        if (enemyAlive)
        {
            enemyTimer--;
            if (enemyTimer == 0)
            {

                gotoxy(enemyX, enemyY);
                cout << "   ";

                switch (dirHorizontal)
                {
                case 'l':
                    enemyX--;
                    if (enemyX == 3)
                        dirHorizontal = 'r';
                    break;
                case 'r':
                    enemyX++;
                    if (enemyX == 81)
                        dirHorizontal = 'l';
                    break;
                }

                setColour(cyan);
                gotoxy(enemyX, enemyY);
                cout << el<<em<<er;
                enemyTimer = ENEMY_SPEED;
            }
        }



        if (Bulletalive)
        {
            timer--;

            if (timer == 0) {
                gotoxy(bulletX, bulletY);
                cout << " ";
                bulletY--;
                if (bulletY < 0)
                    Bulletalive = false;
                else
                {

                    setColour(red);
                    gotoxy(bulletX, bulletY);
                    cout <<bu;
                }
                timer = BULLET_SPEED;
            }
        }


        setColour(red);
        gotoxy(shipXPos, shipYPos);
        cout <<" "<<pm;
        gotoxy(shipXPos, shipYPos + 1);
        cout << ps<<pmj<<ps;


        if (bulletX == enemyX && bulletY == enemyY && Bulletalive ||
            bulletX == enemyX + 1 && bulletY == enemyY && Bulletalive ||
            bulletX == enemyX + 2 && bulletY == enemyY && Bulletalive)
        {
            hits++;
            Bulletalive = false;
        }


        if (numBullets == 0)
            playing = false;

    } while (playing);

    if(hits <= 5){
        setColour(red);
    gotoxy(25, 10);
    cout << "        Game Over"<<endl;
    cout<<"                                 SHIPS HIT:"<< hits<<endl;
    cout<<"                            NO MEDAL";
    _getch();
    _getch();

    }
    else if(hits < 5){
        setColour(green);
    gotoxy(25, 10);
    cout << "        Game Over"<<endl;
    cout<<"                                 SHIPS HIT:"<< hits<<endl;
    cout<<"                               WOODEN MEDAL "<<b;
    _getch();
    _getch();

    }

    else if(hits <10){
        setColour(green);
    gotoxy(25, 10);
    cout << "        Game Over"<<endl;
    cout<<"                                 SHIPS HIT:"<< hits<<endl;
    cout<<"                               STONE MEDAL "<<st;
    _getch();
    _getch();

    }
    else if(hits < 15){
        setColour(green);
    gotoxy(25, 10);
    cout << "        Game Over"<<endl;
    cout<<"                                 SHIPS HIT:"<< hits<<endl;
    cout<<"                               BRONZE MEDAL "<<bt;
    _getch();
    _getch();

    }
    else if(hits >= 20){
        setColour(green);
    gotoxy(25, 10);
    cout << "        Game Over"<<endl;
    cout<<"                                 SHIPS HIT:"<< hits<<endl;
    cout<<"                               SILVER MEDAL "<<slt;
    _getch();
    _getch();

    }
    else if(hits >= 25){
        setColour(green);
    gotoxy(25, 10);
    cout << "        Game Over"<<endl;
    cout<<"                                 SHIPS HIT:"<< hits<<endl;
    cout<<"                               GOLD MEDAL "<<gm;
    _getch();
    _getch();

    }

        break;
    case MenuHelp:

        break;
    case MenuExit:

        break;
}



    return 0;

}


void gotoxy(int x, int y)
{
    COORD coord;
    coord.X = x;
    coord.Y = y;
    SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);
}


void setColour(int ink)
{
    SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), ink);
}


void setConsoleSize(int rows, int columns)
{
    _SMALL_RECT rect;
    COORD coord;
    coord.X = columns;
    coord.Y = rows;
    rect.Top = 0;
    rect.Left = 0;
    rect.Bottom = rows - 1;
    rect.Right = columns - 1;
    SetConsoleScreenBufferSize(GetStdHandle(STD_OUTPUT_HANDLE), coord);
    SetConsoleWindowInfo(GetStdHandle(STD_OUTPUT_HANDLE), TRUE, &rect);
}