Simon Says

Simon Says is a memory sequence game that challenges your short-term memory capacity. The game presents a sequence of colored lights (red, blue, green, yellow) that plays automatically. After the sequence finishes, you must repeat it by tapping the colors in the exact same order. Each successful round adds one more step to the sequence, making it progressively harder to remember. The game ends when you make a mistake in the sequence. Your score is the number of steps in the longest sequence you successfully completed. This classic memory test was originally popularized by the Simon electronic game in 1978, and it remains one of the most effective measures of working memory capacity.

The average adult can reliably remember a sequence of 7-9 items. Sequences longer than 9 steps require chunking strategies — grouping multiple steps into a single mental unit. For example, instead of remembering "red-blue-green-yellow-red-blue" as six separate items, you can remember it as "RGB-YRB" (two chunks of three). The game's tempo is deliberately paced at one color per second, which research has shown to be the optimal speed for working memory encoding. The four colors are positioned as quadrants on a circular layout, making spatial memory a complementary encoding channel. Your best score is saved to localStorage. The game is built with DOM elements and CSS transitions rather than Canvas, making it accessible to screen readers and keyboard-only users. Each color press triggers a distinct tone via Web Audio API, providing auditory feedback that reinforces the visual sequence.

Controls

Designed for both desktop and mobile play. Touch-friendly interface.