Find seven differences in identical pictures of 50, 100, 1000, 2000 and 5000 russian rubles. Complete five levels, find all differences on each level and get fifteen stars. Russian Rubles, money detector, find differences, visual puzzle, observation skills, currency game, 1-player game, challenge, detail, banknotes, financial puzzle, Russian currency, money game, differences in images, hidden objects, educational game, brain teaser