Memory Test Game

Game Rules:

1. 20 levels in total, 5 seconds per level

2. Starting from 1 digit to 20 digits, memorize the number shown

3. Input the number after the timer ends

4. Level 1: 5 points, Level 2: 10 points, and so on up to Level 20: 100 points

5. Total possible score: 1050 points, 840+ points is excellent