A hidden feature appeared again, but...

The game itself is not difficult to clear if you watch some ads.... It's stage 170, hmm... While clearing a time quest once, I clear about 20 stages... so if I estimate 40 rounds per hour, it's a game that takes about 4 hours... should I do it or give up... If I were low on gems, I'd probably play hard, but now the coin exchange is over and my wallet is almost full.... To do or not to do, that is the question....