It is a time bound game where one needs to find 1 difference between two identical looking boards. Once you find a difference between the boards, both boards will refresh to generate a new difference. Find maximum differences within allowed time to get more points. birds puzzle, difference puzzle, online puzzle, hidden object, visual perception, observation skills, brain training, time-based puzzle, find the difference, puzzle game, bird puzzle, cognitive skills, online game, fun game, challenge, brain exercise, hidden differences, scoring, strategic thinking