The time bar should be redesigned

[Danielllllllllllllll]

1. if your answer is incorrect, it will deduct your time. But the animation now is speed up the time deducting animation instead of deducting the time on time bar directly.
2. the game ended before the timer bar become all white.
3. the timer cannot stop when players pause or leave the window or the app
4. (I'm not sure whether the point would be calculated if the number has not been factorized entirely. )