更新於2020年02月24日
1. Infinite practices for basic mathematical operations.
2. Can be played challengingly for speed and correctness.
3. 'Wao' sound for correct answer and 'Sorry' sound for wrong answer.
4. Popup with happy face for correct answer and sad face for wrong answer.
5. Each game is with seven different level.
6. Number of level indicates number of digits.
7. Sound can be muted.
