Time taken for energy to drop by 25% (seconds).
Lower value increases score significantly but makes it more likely you will run out of energy.
Makes controls clickable on Map Symbol Matching exercises to provide extra help. Also shows visual confirmation of correct / wrong / wrong rotation for all exercise types. Disable this if you find the text gets in the way.
Some Achievements are based on session score which can be built up across multiple exercises as long as you have sufficient energy. Enable this if you prefer the score to reset to zero every time you change to a different exercises.
When enabled, usage data is stored locally in your browser so that the Achievements page can function. The data is not sent to the server and you can delete it whenever you want using the button below.