LastDigitFilter is a number reflex game built around a simple digit rule. A target last digit appears at the top of the screen, and random numbers float across the play area. You must tap only the numbers that end with that digit. Tap a number with the wrong last digit and you earn a mistake. Three mistakes end the game. The target can change each round, and numbers appear faster as your score rises. Stay alert, read the digit every round, and keep your fingers ready. It is easy to learn but hard to master when the pace picks up and the screen fills with distractions.