Workspaces is giving me an error.

import java.io.Console;

public  class Prompter {
  private Game mGame;


  public Prompter (Game game) {
    mGame = game;  
  }

  public boolean promptForGuess() {
    Console console = System.console();
    String guessAsString = console.readline("Enter a Letter:  ");
    char guess = guessAsString.charAt(0);
    return mGame.applyGuess(guess);
  }

public class Hangman {

    public static void main(String[] args) {
        // Enter amazing code here:
      Game game = new Game("treehouse");
      Prompter prompter = new Prompter(game);
      boolean isHit = prompter.promptForGuess();
      if (isHit) {
        System.out.println("We got a hit!");
      } else {
        System.out.println("Nope");
      }
    }

}

public class Game {
  private String mAnswer;
  private String mHits;
  private String mMisses;

  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 isHit;
  }

}