#include <Uefi.h>
 #include <Library/PcdLib.h>
 #include <Library/UefiLib.h>
 #include <Library/UefiApplicationEntryPoint.h>

 EFI_STATUS
 EFIAPI
 UefiMain (
  IN EFI_HANDLEImageHandle,
  IN EFI_SYSTEM_TABLE *SystemTable
  )
 {
         UINTN Index;
         EFI_INPUT_KEY Key;
         CHAR16 *result = L"pinguin";
         CHAR16 *state = L"_______";
         UINTN Attempt = 0;

         do {
                 Attempt++;
                 SystemTable->ConOut->ClearScreen(SystemTable->ConOut);

                 Print(L"Welcome to Hangman!\n");
                 Print(L"Attempt: %d\n\n\n", Attempt);

                 // print found characters
                 for(UINTN i=0; i<StrLen(state); i++) {
                         Print(L"%c ", state[i]);
                 }

                 // read characters from keyboard
                 SystemTable->BootServices->WaitForEvent(1, &SystemTable->ConIn->WaitForKey, &Index);
                 SystemTable->ConIn->ReadKeyStroke(SystemTable->ConIn, &Key);

                 // check if pressed key is in result
                 for(UINTN i=0; i<StrLen(result); i++) {
                         if (Key.UnicodeChar == result[i]) {
                                 state[i] = result[i];
                         }
                 }
         } while(StrCmp(result, state) != 0); // repeat until all characters are found

         // print final result
         SystemTable->ConOut->SetCursorPosition(SystemTable->ConOut, 0 , 4);
         for(UINTN i=0; i<StrLen(state); i++) {
                 Print(L"%c ", state[i]);
         }
         // wait for key
         Print(L"\n\nCongratulations!\nPress any key to continue...\n");
         SystemTable->BootServices->WaitForEvent (1, &SystemTable->ConIn->WaitForKey,
         &Index);

         return EFI_SUCCESS;
 }