The new mode is officially called Campaign Mode.
The next update will officially open up the Campaign Mode. It will continue to update the content of the mode, such as new characters, new levels. Each time I add these, the amount of work and complexity increases exponentially, but I step by step do it.
The next three screenshots show the new Mode selection interface, which is a mix of Chinese and English.
The final screenshot shows the four characters that have been recruited in Campaign Mode (there are more characters that can be recruited). Take a closer look at the blonde angel, which seems to be a pixel taller than the other characters, and very faithfully restores the tall and straight figure of the young man...
The Campaign Mode not only includes all the characters from the Story Mode, but also recruits troops like the 7th New York State Militia that are NPC in the Story Mode.
The next update will also raise the price appropriately, and bring more and better content.