Скины
Как вы заметили, некоторые шары имеют скин и нигде не видно, как этот скин туда засунуть. Всё очень просто, скины закреплены за никами. Вот список ников со скинами:

poland, usa, china, russia, canada, australia, spain, brazil, germany, ukraine, france, sweden, hitler, north korea, south korea, japan, united kingdom, earth, greece, latvia, lithuania, estonia, finland, norway, cia, maldivas, austria, nigeria, reddit, yaranaika, confederate, 9gag, indiana, 4chan, italy, ussr, pewdiepie, bulgaria, tumblr, hong kong, portugal, jamaica, german empire, mexico, sanik, switzerland, croatia, chile, indonesia, bangladesh, thailand, iran, iraq, peru, moon, botswana, bosnia, netherlands, european union, taiwan, pakistan, hungary, satanist, qing dynasty, nazi, matriarchy, patriarchy, feminism, ireland, texas, facepunch, prodota, cambodia, steam, piccolo, ea, india, kc, denmark, quebec, ayy lmao, sealand, bait, tsarist russia, origin, vinesauce, stalin, belgium, luxembourg, stussy, prussia, 8ch, argentina, scotland, sir, romania, belarus, wojak, isis, doge