You can play by changing the settings for "Number of Words," "Number of Digits," and "Interval."
- Number of Words: 5-100
- Number of Digits: 1-5
- Interval: 0.5-3.0 seconds in 0.5-second increments
The colors are gentler than regular flash mental arithmetic, making it easier on the eyes, so it can be enjoyed by people of all ages, from young children to seniors!