I'd imagine so. I stopped at around 12. There are much more productive things to do in life than play games on your phone. I'm 25 and I have never downloaded a game for my phone nor have I ever played one. I'm 100% serious.
Yeah, all those amateur piano players are serious losers.
Still, I'd be willing to bet that there is a video game out there that you'd thoroughly enjoy (be it mobile, PC, whatever), 13 years is a long time to have never played any games and a lot has happened in the industry; I say this earnestly and not as a judgement, one day when you're feeling open minded, consider taking some gaming recommendations from a gamer friend who knows you well, I think you'll be pleasantly surprised.