Naruto Kage Bunshinno Jutsu

You control the mouse, watching a group of Naruto characters shuffle around the screen. Your only job is to click on the real Naruto as he mixes with his clones after each quick movement. The clones look identical, so you have to spot the slight difference in his stance or the subtle cue that marks the original. The pace picks up steadily, and missing a click or hitting a clone ends the round. It feels like a concentrated exercise in paying attention, a brief challenge of reflexes and focus before you move on to something else.