Continuous digital fun

Basic gameplay: Choose five consecutive numbers from 1 to 15. Four of them have been given. Find the remaining numbers in the shortest time.
Simple gameplay: Only one number in the bottom two rows of numbers can be combined into a continuous number, select it to enter the next level.
Difficult gameplay: More than one number in the bottom two rows of numbers can be combined into consecutive numbers, select them to enter the next level.
Description: This game is designed to test the mental arithmetic and hands-on ability of scoring, time-keeping, leisure and entertainment, a stand-alone game that is not connected to the Internet. It does not participate in or involves any illegal activities. At the same time, everyone is welcome to supervise and encourage!