I feel logic to be wrong. Is it so??

public class Hangman {
    public static void main(String[] args) {
        Game game = new Game("Treehouse");
// "Treehouse" is our mAnswer that is stored in the Game object
// we will compare our input with it
        Prompter prompter = new Prompter(game); 
// new Prompter object that takes the game object with the answer "Treehouse"
        prompter.play();
// so from here the compiler is going to the Prompter class to compare the Users input with "Treehouse"
    }
}

    public void play() {
        while (mGame.getRemainingTries() > 0 && !mGame.isSolved()) {
            displayProgress();
// shows how many tries are left and the letters that have been already guessed 
            promptForGuess();
// >>>>>>>>INPUT GUESS-METHOD<<<<<<<<<
        }
        if (mGame.isSolved()) {
            System.out.printf("Congratulations you won the game with %s remaining tries", mGame.getRemainingTries());
        } else {
            System.out.printf("Bummer the answer was %s", mGame.getAnswer());
        }
    }

  public boolean promptForGuess() {
        Scanner s = new Scanner(System.in);
        char guess;
        boolean isHit = false;
        boolean isValidGuess = false;

        while (!isValidGuess) {
            System.out.println("Enter a letter: ");
            String guessAsString = s.nextLine();
// >>>>>>> guessAsString is the Users input

            try {
                isHit = mGame.applyGuess(guessAsString);
// to validate the Input and compare it with the mAnswer ("Treehouse")
// the applyGuess method of the Game class is activated
// this method takes the input of the User
                isValidGuess = true;
            } catch (IllegalArgumentException iae) {
                System.out.printf("%s. Please try again. \n", iae.getMessage());
            }
        }
        return isHit;// returns isHit true if guess is true
    }

 public boolean applyGuess(char letter) { 
        letter = validateGuess(letter);
// this method returns only a letter if it is really a letter and the letter haven´t been guessed already
// if the letter has been already guessed you get a WARNING and you need to guess again (loop)
        boolean isHit = mAnswer.indexOf(letter) >= 0;
       //  str.indexOf(char target) -- searches left-to-right of the String mAnswer for target
       //  Returns index where found, or -1 if not found
       //  so if the return is > 1 it is a hit

        if (isHit) {
            mHits += letter;
        } else {
            mMisses += letter;
        }
        return isHit;
    }