Hidden Quests Can Be Completed Easily

I've played the number game a few times But this game is pretty easy to level up. You can easily get all the rewards from the hidden quests. If you grind a bit, you should be able to complete everything in one or two days. I just chose to play slowly, though. The only downside is the abundance of ads. Ads pop up after playing for a short while, but luckily most of them are only 5 seconds long. I've already completed the rewards for levels 5 and 15.