GameState.java

import java.awt.*;
import java.util.*;
import java.util.List;
import java.util.concurrent.ConcurrentHashMap;

public class GameState {
    private static final int WIDTH = 800, HEIGHT = 600;
    private static final int BUNNY_SIZE = 40, CAR_WIDTH = 80, CAR_HEIGHT = 40;
    private static final int LANE_HEIGHT = 60, GRASS_HEIGHT = 80, NUM_LANES = 5;
    private static final int HOUSE_Y = 50, HOUSE_SIZE = 60;

    private Map<String, Player> players = new ConcurrentHashMap<>();
    private List<Car> cars = new ArrayList<>();
    private boolean gameOver = false;
    private String winner = null;
    private int score = 0;
    private int level = 1;

    public void startGame(boolean isSinglePlayer) {
        players.clear();
        cars.clear();
        gameOver = false;
        winner = null;
        score = 0;
        level = 1;

        players.put("PLAYER1", new Player(200, HEIGHT - BUNNY_SIZE - 10, Color.RED));
        if (!isSinglePlayer) {
            players.put("PLAYER2", new Player(600, HEIGHT - BUNNY_SIZE - 10, Color.BLUE));
        }
        initializeCars();
    }

    private void initializeCars() {
        Random rand = new Random();
        for (int i = 0; i < NUM_LANES; i++) {
            int y = HOUSE_Y + HOUSE_SIZE + i * (LANE_HEIGHT + GRASS_HEIGHT) + (LANE_HEIGHT - CAR_HEIGHT) / 2;
            int speed = (rand.nextInt(3) + 2) * (rand.nextBoolean() ? 1 : -1);
            cars.add(new Car(rand.nextInt(WIDTH), y, speed));
        }
    }

    public void update() {
        moveCars();
        checkCollisions();
        checkWinCondition();
        updateScore();
    }

    private void moveCars() {
        for (Car car : cars) {
            car.move();
            if (car.getX() > WIDTH) car.setX(-CAR_WIDTH);
            if (car.getX() < -CAR_WIDTH) car.setX(WIDTH);
        }
    }

    private void checkCollisions() {
        for (Player player : players.values()) {
            for (Car car : cars) {
                if (car.checkCollision(player.getX(), player.getY(), BUNNY_SIZE)) {
                    player.reset();
                    score = Math.max(0, score - 50);
                }
            }
        }
    }

    private void checkWinCondition() {
        for (Map.Entry<String, Player> entry : players.entrySet()) {