Не могу опубликовать игру

package com.javarush.games.snake; import com.javarush.engine.cell.*; import static com.javarush.games.snake.Direction.*; public class SnakeGame extends Game { public static final int WIDTH = 15; public static final int HEIGHT = 15; private Snake snake; private Apple apple; private int turnDelay; private boolean isGameStopped; private static final int GOAL = 28; private int score; public void initialize(){ setScreenSize(WIDTH, HEIGHT); createGame(); } private void createGame() { turnDelay = 300; Snake s1 = new Snake(WIDTH/2, HEIGHT/2); snake = s1; createNewApple(); isGameStopped = false; drawScene(); setTurnTimer(turnDelay); score = 0; setScore(score); } private void drawScene() { int y = 0; while (y < WIDTH) { for (int x = 0; x < HEIGHT; x++) { setCellValueEx(x, y, Color.DARKSEAGREEN, ""); } y++; } snake.draw(this); apple.draw(this); } public void onTurn(int i){ snake.move(apple); if (!apple.isAlive){ createNewApple(); score = score + 5; setScore(score); turnDelay = turnDelay - 10; setTurnTimer(turnDelay); } if (!snake.isAlive) gameOver(); if (snake.getLength() > GOAL) win(); drawScene(); } public void onKeyPress(Key key) { if (key == Key.UP) snake.setDirection(UP); if (key == Key.DOWN) snake.setDirection(DOWN); if (key == Key.LEFT) snake.setDirection(LEFT); if (key == Key.RIGHT) snake.setDirection(RIGHT); if (isGameStopped) { if (key == Key.SPACE) createGame(); } } private void createNewApple() { do apple = new Apple (getRandomNumber(WIDTH), getRandomNumber(HEIGHT)); while (snake.checkCollision(apple)); } private void gameOver() { isGameStopped = true; this.stopTurnTimer(); this.showMessageDialog(Color.NONE, "GAME OVER", Color.BLACK, 75); } private void win() { stopTurnTimer(); isGameStopped = true; showMessageDialog(Color.NONE, "YOU WIN", Color.BLACK, 75); } }