How do you want me to increase the longevity of the game so that the game would last longer?
I can prolong the game either through adding more story, or adding grindy gameplay.
Currently, the idea of the game is that you will train your Idol, and then you will do a concert on certain days. You will eventually unlock new idols through the concerts and you will be able to rank up your idol/agency from the concerts as well. Concerts is the only way to make money.
The game is planned to have 4 characters, so prolonging the game with a bunch of characters I won't make that a poll option.
Finishing HMFM Fast Food 1 and 2 I think were pretty quick, so that's kind of why I am trying to prolong the game with whichever method you guys think is best! (Some say they would finish Fast Food 2 in 30 minutes, so it is kind of a problem.)