anchor.diff:  class Game {
     int score =  0;
     int highScore = 0;
  -  StopWatch currentTime = new StopWatch();
  +  Stopwatch currentTime = new Stopwatch();
     
     int gameState;
     
  
positive.code:         
          if (click && 
              x < 680 && x > 540 &&
              y < 90 && y > 50) {
            print("New Game");
            
            if (score > highScore) {
              highScore = score;
            }
  
negative.code:   int enumStatePlaying = 2;  //cards hidden, player can select
    int enumStateFinished = 3;  // Reveal all cards, show score, offer new game
    
    int previewState;
    
    int enumPreviewReady = 0;
    int enumPreviewGo = 1;
    int enumPreviewReveal = 2;
    
    int matchesLeft = 0;
    
    Game() {
      gameState = enumStateMenu;
    }
    
    // to be run whenever player says to start a new game
    void startGame() {
      //TODO initialize all the cards
      
      gameState = enumStatePreview;
      previewState = enumPreviewReady;
      var timer1 = gameLoop.addTimer((timer) => previewState = enumPreviewGo, 2.0);
      var timer2 = gameLoop.addTimer((timer) => previewState = enumPreviewReveal, 2.75);
      var timer3 = gameLoop.addTimer((timer) => startPlaying(), 6.75);
    }
    
    void startPlaying() {
      gameState = enumStatePlaying;
      currentTime.start();
    }
    
    void finishGame() {
      gameState = enumStateFinished;
      currentTime.stop();
    }
    
    void update(double dt) {
  