I have no idea whats wrong, java experts please help!

I am following a video tutorial from treehouse and i thought i was writing the exact same thing as the teacher, but apparently not. When i compile the code i get 13 errors, i am trying to fix the problems but i don't understand some of the errors. Here are my codes:

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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;
    }   

  public String getCurrentProgress() {
    String progress = "";
    for (char letter: mAnswer.toCharArray()) {
      char display = '_';
      if (mHits.indexOf(letter)) >= 0 {
        display = letter;
      }
      progress += display;


    }
    return progress;
  }

}

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 void displayProgress() {
   System.out.printf("Try to solve: %s\n", mGame.getCurrentProgress());
  }
}

public class Hangman {

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

Console:

treehouse:~/workspace$ javac Hangman.java
Picked up JAVA_TOOL_OPTIONS: -Xmx128m
./Game.java:27: error: illegal start of expression
if (mHits.indexOf(letter)) >= 0 {
^
./Game.java:27: error: ';' expected
if (mHits.indexOf(letter)) >= 0 {
^
./Prompter.java:4: error: ';' expected
Private Game mGame;
^
./Prompter.java:4: error: <identifier> expected
Private Game mGame;
^
./Prompter.java:4: error: cannot find symbol
Private Game mGame;
^
symbol: class Private
location: class Prompter
./Prompter.java:4: error: cannot find symbol
Private Game mGame;
^
symbol: class mGame
location: class Prompter
Hangman.java:8: error: cannot find symbol
boolean isHit = prompter.prompterForGuess();
^
symbol: variable prompter
location: class Hangman
Hangman.java:14: error: cannot find symbol
prompter.displayProgress();
^
symbol: variable prompter
location: class Hangman
./Game.java:27: error: incompatible types: int cannot be converted to boolean
if (mHits.indexOf(letter)) >= 0 {
^
./Prompter.java:7: error: cannot find symbol
mGame = game;
^
symbol: variable mGame
location: class Prompter
./Prompter.java:12: error: incompatible types: String cannot be converted to boolean
String guessAsString = console.readline("Enter a letter: ");
^
./Prompter.java:14: error: cannot find symbol
return mGame.applyGuess(guess);
^
symbol: variable mGame
location: class Prompter
./Prompter.java:18: error: cannot find symbol
System.out.printf("Try to solve: %s\n", mGame.getCurrentProgress());
^
symbol: variable mGame
location: class Prompter
Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output 13 errors