Я запуталась окончательно

package com.javarush.games.game2048; import com.javarush.engine.cell.Game; import com.javarush.engine.cell.*; import java.util.Arrays; public class Game2048 extends Game { private static final int SIDE = 4; private int[][] gameField = new int[SIDE][SIDE];//приватная матрица @Override public void initialize() { setScreenSize(SIDE, SIDE); createGame(); drawScene(); } private void createGame() { createNewNumber(); createNewNumber(); } private void drawScene() { for (int x = 0; x < SIDE; x++) { for (int y = 0; y < SIDE; y++) { int v = gameField[y][x]; setCellColoredNumber(x, y, v); } } } private void createNewNumber() { int x = getRandomNumber(SIDE); int y = getRandomNumber(SIDE); int number = getRandomNumber(10); if (gameField[y][x] == 0) { if (number < 9) gameField[y][x] = 2; else gameField[y][x] = 4; } else createNewNumber(); } private Color getColorByValue(int value) { Color c = null; if (value == 2) c = Color.AQUA; if (value == 2) c = Color.GRAY; if (value == 4) c = Color.RED; if (value == 8) c = Color.FIREBRICK; if (value == 16) c = Color.LAVENDER; if (value == 32) c = Color.GREENYELLOW; if (value == 64) c = Color.TEAL; if (value == 128) c = Color.NAVAJOWHITE; if (value == 256) c = Color.MAGENTA; if (value == 512) c = Color.CRIMSON; if (value == 1024) c = Color.LIME; if (value == 2048) c = Color.TOMATO; return c; } private void setCellColoredNumber(int x, int y, int value) { Color color = getColorByValue(gameField[y][x]); if (value == 0) { setCellValueEx(x, y, color, ""); } else setCellValueEx(x, y, color, String.valueOf(value)); } private boolean compressRow(int[] row) { boolean result = false; for (int i= 0; i < row.length-1; i++) { if (row[i]== 0 && i<row.length-1&&row[i+1]!=0) { int tmp = row[i]; row[i] = row[i + 1]; row[i + 1] = row[i]; row[i] = tmp; i = -1; result = true; } else result = false; } return result; } }