Merge branch 'top-secret' into 'master'

package com.example.game2d;

import java.io.Serializable;

import java.util.HashMap;

import java.util.Map;

public class Scoreboard implements Serializable {

    public Map<String, Double> scoreboard;

    Scoreboard() {

        scoreboard = new HashMap<String, Double>();

    }

    public void add(String username, double score) {

        if (scoreboard != null) {

            scoreboard.put(username, score);

        }

    }

}