Hangman game always reports a hit

public class Hangman {

    public static void main(String[] args) {
        // Enter amazing code here:

        //Supply a string to start the game.
        Game game = new Game("treehouse");

        //The following code calls the prompterForGuess method with a new Prompter object.
        Prompter prompter = new Prompter(game);
        boolean isHit = prompter.promptForGuess();

        if(isHit) {
             System.out.println("We got a Hit!");
        } else {
             System.out.println("Whoops that was a miss");  
        }
    }

}

public class Game {
  //variable declared but not initialised
  private String mAnswer;

  private String mHits;
  private String mMisses;

  //constructor function taking answer in form of a string
  public Game(String answer) {
     mAnswer = answer;   
       mHits = "";
     mMisses = "";


  }

  public boolean applyGuess(char letter) {
     boolean isHit = mAnswer.indexOf(letter) >= 0;
     if (isHit) {
        mHits += letter;
     }  else {
        mMisses += letter;
     }
     return true;
  }
}

//Import package
import java.io.Console;

public class Prompter {

   //private member variable
   private Game mGame;  

   //constructor function
   public Prompter (Game game) {


       //set member variable equal to what is passed in
       mGame = game;
   }

  //a prompter method for the user to guess new letters  
  public boolean promptForGuess() {
      Console console = System.console();
      String guessAsString = console.readLine("Enter a letter: ");

      //define new guess in a char variable.
      char guess = guessAsString.charAt(0);
      return mGame.applyGuess(guess);

  }

}