Не принимает валидатор

package com.javarush.games.snake; import com.javarush.engine.cell.Color; import com.javarush.engine.cell.*; import com.javarush.engine.cell.Game; public class SnakeGame extends Game { public static final int HEIGHT = 15; public static final int WIDTH = 15; private Snake snake; private int score; private Apple apple; private static final int GOAL = 28; private boolean isGameStopped; private int turnDelay=300; //Всё, что должно происходить в игре на протяжении одного хода, описывается здесь. public void onTurn(int step) { snake.move(apple); if (!apple.isAlive) { createNewApple(); score = score+5; setScore(score); turnDelay = turnDelay - 10; setTurnTimer(turnDelay); } setTurnTimer(turnDelay); if (!snake.isAlive) gameOver(); if (GOAL < snake.getLength()) win(); drawScene(); } //Создаем поле @Override public void initialize() { setScreenSize(15, 15); createGame(); } private void win() { stopTurnTimer(); isGameStopped = true; showMessageDialog(Color.WHITE, "Win", Color.RED, 16); } private void createNewApple() { do { apple = new Apple (getRandomNumber(WIDTH), getRandomNumber(HEIGHT)); }while (snake.checkCollision(apple)); } private void gameOver(){ this.stopTurnTimer(); this.showMessageDialog(Color.BLACK, "Game Over", Color.RED, 75); isGameStopped = true; } /* @Override public void onKeyPress(Key key){ if (key == Key.LEFT && snake.getDirection() != Direction.RIGHT) snake.setDirection(Direction.LEFT); if (key == Key.RIGHT && snake.getDirection() != Direction.LEFT) snake.setDirection(Direction.RIGHT); if (key == Key.UP && snake.getDirection() != Direction.DOWN) snake.setDirection(Direction.UP); if (key == Key.DOWN && snake.getDirection() != Direction.UP) snake.setDirection(Direction.DOWN); } */ @Override public void onKeyPress(Key key){ if (key == Key.SPACE && isGameStopped == true) { createGame(); } if(key == Key.LEFT){ snake.setDirection(Direction.LEFT); } if(key == Key.RIGHT){ snake.setDirection(Direction.RIGHT); } if(key == Key.UP){ snake.setDirection(Direction.UP); } if(key == Key.DOWN){ snake.setDirection(Direction.DOWN); } } //Создаем игру private void createGame(){ snake = new Snake(WIDTH/2, HEIGHT/2); //Apple app = new Apple(5,5); createNewApple(); score = 0; setScore(score); isGameStopped = false; drawScene(); turnDelay=300; setTurnTimer(turnDelay); //Apple app = new Apple(7,7); //app.draw(this); } //Отрисовка поля private void drawScene(){ for(int x = 0; x < HEIGHT; x++){ for(int y = 0; y < WIDTH; y++){ //После передвижения змейки нужно очищать игровое поле от уже несуществующих ее элементов setCellValueEx(x, y,Color.DARKSEAGREEN, ""); } } snake.draw(this); apple.draw(this); } }