It's a mediocre game, so the QR Code scanner might not have a limit for data, so you can crash it with a QR Code and run unlicensed code like how Ninjhax worked. I don't think there will be any updates either, of course the eShop is closing so they might not be able to update the game, but it's also been out for 5 years and there have been no updates. Also, the game is 5 dollars, so it's pretty cheap, I guess get it while you can (after August 29th, when you won't be able to use Gift Cards anymore, you can still use download codes, here is the game on Nintendo's site: https://www.nintendo.com/store/products/lionel-city-builder-3d-rise-of-the-rails-3ds/).