turbo C 下的打字游戏

在这里贴上最近自己忙活的用turbo C编写的“打字游戏”的源代码：
#include<graphics.h>
#include<conio.h>
#include<STDLIB.h>
#include<dos.h>
#define BK_COLOR BLACK
#define CHAR_COLOR WHITE
#define C_COLOR BLUE
#define num 10
#define SPEED 3000
#define Esc 27
#define MenuX 200
#define MenuY 110
#define MenuWidth 200
#define MenuSinH 40
#define ChoiceX MenuX+15
#define ChoiceY MenuY+10
#define ChoiceWidth 170
#define ChoiceH 25
#define UpKey 72
#define DownKey 80
#define Enter 13
void  Choice(int c_x,int c_y,int color)
{
 setfillstyle(1,color);
 bar(c_x,c_y,c_x+ChoiceWidth,c_y+ChoiceH);
}
void Main_Menu()
{
 settextstyle(0,0,2);
 outtextxy(MenuX+20,MenuY+15,"Start Game");
 outtextxy(MenuX+20,MenuY+MenuSinH+15,"Game Steup");
 outtextxy(MenuX+40,MenuY+2*MenuSinH+15,"Exit");
}
void Option_Menu()
{
 settextstyle(0,0,2);
 outtextxy(MenuX+20,MenuY+15,"beginner");
 outtextxy(MenuX+20,MenuY+MenuSinH+15,"advancer");
 outtextxy(MenuX+40,MenuY+2*MenuSinH+15,"senior");
}
int ChooseMenu(int flag)
{
 int x,y;
 char C_key;
 x=ChoiceX;y=ChoiceY;
 do
 {
  kbhit();
  C_key=getch();
  if(C_key==Esc)
   return Esc;
  else
   if(C_key==Enter)
    return y;
  else
  switch(C_key)
  {
  case UpKey:
   if(y==ChoiceY)
    break;
   else
   {
    Choice(x,y,BK_COLOR);
    y-=MenuSinH;
    Choice(x,y,C_COLOR);
   }
   break;
  case DownKey:
   if (y==ChoiceY+2*MenuSinH)
    break;
   else
   {
    Choice(x,y,BLACK);
    y+