В чём проблема

procedure control;
var key:char;
begin
key:=readkey;
case ord(key) of
  72: y:=y-1;
  80: y:=y+1;
  75: x:=x-1;
  77: x:=x+1;
  27: exit:=1;
  end;
end;

procedure control;
var key:char;
begin
key:=readkey;
case ord(key) of
  0: case ord(readkey) of
      72: y:=y-1;
      80: y:=y+1;
      75: x:=x-1;
      77: x:=x+1;
      end;
  27: exit:=1;
  end;
end;

program game;
uses graph, crt;
var x, y, ox, oy: integer;
    exit: integer;
    Size: integer;
    Image: pointer;

procedure start_graph;
var gd,gm:integer;
begin
 gd:=detect;
 gm:=5;
 initgraph(gd,gm,'');
end;

procedure draw_spr(x1,y1,x2,y2:integer;path:string);
var xd,yd:integer;
    filespr:text;
    id:integer;
begin
  assign(filespr,path);
  reset(filespr);
  for yd:=y1 to y2 do begin
    for xd:=x1 to x2 do begin
      read(filespr,id);
      putpixel(xd,yd,id);
    end;
  end;
  close(filespr);
end;

procedure control;
var key:char;
begin
 key:=readkey;
 case ord(key) of
  72: y:=y-1;
  80: y:=y+1;
  75: x:=x-1;
  77: x:=x+1;
  27: exit:=1;
  end;
end;

procedure main;
begin
 x:=1;
 y:=1;
 exit:=0;
end;

begin
  start_graph;
  main;
  draw_spr(x, y, 12, 10, 'player.spr');
  Size := ImageSize(x, y, 12, 10);
  GetMem(Image, Size);
  GetImage(x, y, 12, 10, Image^);
  ClearDevice;
  repeat
    PutImage(x, y, Image^, XorPut);
    ox := x;
    oy := y;
    control;
    PutImage(ox, oy, Image^, XorPut);
  until exit=1;
  FreeMem(Image, Size);
  CloseGraph;
end.