Tap the numbers or letters on the grid in ascending order (1→2→3… or A→B→C…) as quickly as possible. Choose the grid size and mode (numbers or letters). Start the timer, then tap the tiles in sequence. Correct taps turn green and are locked; Incorrect taps flash red. When the last tile is touched, the timer stops and shows the end time. Challenge yourself to beat your best record! This game trains attention, visual perception and cognitive agility, making it perfect for brain training. Practice daily to improve speed and concentration. Enjoy the challenge!