I don't know why it can't verify.

package com.codegym.games.game2048;

import com.codegym.engine.cell.Game;
import com.codegym.engine.cell.*;

import java.util.*;
import java.util.function.IntPredicate;


/**
 * @author zhouqichun
 * @version 1.0
 * @date 2021/2/19 - 02 - 19 - 16:35
 * @description CodeGymTasks com.codegym.games.game2048
 */
public class Game2048 extends Game {
    private static final int SIDE = 4;
    private boolean isGameStopped = false;
    private int[][] gameField;
    @Override
    public void initialize() {
        setScreenSize(SIDE, SIDE);
        createGame();
        drawScene();
    }

    private void createGame() {
        gameField = new int[SIDE][SIDE];
        createNewNumber();
        createNewNumber();
    }

    private void drawScene() {
        for (int x = 0; x < SIDE; x++) {
            for (int y = 0; y < SIDE; y++) {
                setCellColoredNumber(x, y, gameField[y][x]);
            }
        }
    }

    private void createNewNumber() {
        if (getMaxTileValue() == 2048) {
            win();
        }
        int x;
        int y;
        do {
            x = getRandomNumber(SIDE);
            y = getRandomNumber(SIDE);
        } while (gameField[y][x]!=0);
        if (getRandomNumber(10) == 9) {
            gameField[y][x] = 4;
        } else {
            gameField[y][x] = 2;
        }
    }

    private Color getColorByValue(int value) {
        if (value == 0) {
            return Color.YELLOW;
        }
        if (value == 2) {
            return Color.RED;
        }
        if (value == 4) {
            return Color.BLUE;
        }
        if (value == 6) {
            return Color.ALICEBLUE;
        }
        if (value == 8) {
            return Color.ANTIQUEWHITE;
        }
        if (value == 16) {
            return Color.AQUAMARINE;
        }
        if (value == 32) {
            return Color.AZURE;
        }
        if (value == 64) {
            return Color.BEIGE;
        }
        if (value == 128) {
            return Color.BISQUE;
        }
        if (value == 256) {
            return Color.BLANCHEDALMOND;
        }
        if (value == 512) {
            return Color.BURLYWOOD;
        }
        if (value == 1024) {
            return Color.CORNSILK;
        }
        return Color.GREENYELLOW;
    }

    private void setCellColoredNumber(int x, int y, int value) {
        if (value == 0) {
            setCellValueEx(x, y, getColorByValue(value), "");
        } else {
            setCellValueEx(x, y, getColorByValue(value), ""+value);
        }
    }

    private boolean compressRow(int[] row) {
        int firstIndexOfZero = row.length;
        boolean flag = false;
        for (int i = 0; i < row.length; i++) {
            if (row[i] == 0) {
                firstIndexOfZero = i;
                break;
            }
        }
        for (int i = firstIndexOfZero+1; i < row.length; i++) {
            if (row[i] != 0) {
                row[firstIndexOfZero++] = row[i];
                row[i] = 0;
                flag = true;
            }
        }

        return flag;
    }

    private boolean mergeRow(int[] row) {
        boolean flag = false;
        for (int i = 1; i < row.length; i++) {
            if (row[i] == row[i - 1] && row[i] != 0) {
                row[i-1] += row[i];
                row[i] = 0;
                flag = true;
            }
        }
        return flag;
    }

    @Override
    public void onKeyPress(Key key) {
        if (isGameStopped) {
            if (key == Key.SPACE) {
                isGameStopped = false;
                createGame();
                drawScene();
            } else {
                return;
            }
        }

        if (!canUserMove()) {
            gameOver();
            return;
        }

        if (key == Key.UP) {
            moveUp();
        } else if (key == Key.RIGHT) {
            moveRight();
        } else if (key == Key.DOWN) {
            moveDown();
        } else if (key == Key.LEFT) {
            moveLeft();
        } else {
            return;
        }
        drawScene();

    }

    private void moveUp() {
        for (int i = 0; i < 3; i++) {
            rotateClockwise();
        }
        moveLeft();
        rotateClockwise();
    }

    private void moveDown() {
        rotateClockwise();
        moveLeft();
        for (int i = 0; i < 3; i++) {
            rotateClockwise();
        }
    }

    private void moveLeft() {
        boolean flag = false;
        for (int[] ints : gameField) {
            boolean wasCompressed = compressRow(ints);
            boolean wasMerged = mergeRow(ints);
            if (wasMerged) {
                compressRow(ints);
            }
            if (wasCompressed || wasMerged) {
                flag = true;
            }
        }
        if (flag) {
            createNewNumber();
        }
    }

    private void moveRight() {
        for (int i = 0; i < 2; i++) {
            rotateClockwise();
        }
        moveLeft();
        for (int i = 0; i < 2; i++) {
            rotateClockwise();
        }
    }

    private void rotateClockwise() {
        int[][] temp = new int[SIDE][SIDE];
        for (int i = 0; i < SIDE; i++) {
            for (int i1 = 0; i1 < SIDE; i1++) {
                temp[i1][SIDE-1-i] = gameField[i][i1];
            }
        }
        gameField = temp;
    }

    private int getMaxTileValue() {
        return Arrays.stream(Arrays.stream(gameField).max(new Comparator<int[]>() {
            @Override
            public int compare(int[] o1, int[] o2) {
                int max1 = Arrays.stream(o1).max().getAsInt();
                int max2 = Arrays.stream(o2).max().getAsInt();
                if (max1 > max2) {
                    return 1;
                }
                if (max1 < max2) {
                    return - 1;
                }
                return 0;
            }
        }).get()).max().getAsInt();
    }

    private void win() {
        isGameStopped = true;
        showMessageDialog(Color.RED,"YOU WIN",Color.WHITE, 15);
    }

    private boolean canUserMove() {
        for (int[] ints : gameField) {
            if (Arrays.stream(ints).anyMatch(new IntPredicate() {
                @Override
                public boolean test(int value) {
                    if (value == 0) {
                        return true;
                    }
                    return false;
                }
            })) {
                return true;
            }
        }

        for (int y = 0; y < SIDE; y++) {
            for (int x = 0; x < SIDE; x++) {
                if (y < SIDE - 1 && gameField[y][x] == gameField[y + 1][x]) {
                    return true;
                } else if ((x < SIDE - 1) && gameField[y][x] == gameField[y][x + 1]) {
                    return true;
                }
            }
        }

        return false;
    }

    private void gameOver() {
        isGameStopped = true;
        showMessageDialog(Color.GRAY,"GameOver",Color.WHITE, 15);
    }

}