Grinding is the answer.

Consistency is ultimately the most reliable strategy. Reducing repetitive tasks by planning an efficient route is also a good method. Don't push yourself too hard.

I know, right? ㅠ.. You play games to make money, but end up spending real money and going into the negative... the reality of it all.....

This game has a lot to do, but even though clearing stages early on is automatic, there's so much they ask you to do. I deleted the game and reinstalled it, but it reset.