FLASH is a free working memory game. Watch a sequence of colored tiles light up, then repeat the pattern. Each round adds a tile. How long a sequence can you hold? Used loosely, this is the same drill as the classic Corsi block-tapping test, miniaturized into a daily exercise.
Flash is one of six free killpipe brain games. Working memory is the bottleneck for reading comprehension, following instructions, and any task that involves holding context. Build it like a muscle, one minute a day.