Click go, and within 1-5 seconds the color will change... Then click Stop!
This is a reaction time training game that lets you test your reflexes and improve your brain's ability to react to visual stimulation. You can have fun trying to set a highscore playing this game, while knowing you're improving your mind.
The average human reaction time is approximiately 0.26 seconds to visual stimuli. So if you can get under that while playing this game, you are doing well! But keep in mind other factors, such as your age, tiredness levels, and whether you have much experience working with your reaction time will also impact the outcome.