No hidden quests, but...

I haven't played many games like this, but it's better than I expected. You just run around and catch monsters that appear, and there's a good variety of them. Is it a simple grind game..? You can auto-battle, but it doesn't move around automatically. 😓 It's a bit boring at first, but when I kept playing to fill the 30-minute time quest, I got more slots and it became fun, so I ended up playing for over 2 hours lol. There are ads, but they're about 20-45 seconds long, and there are many short ones, which is nice.