Can't tell whether it's a bug or not but my iPhone 6S [iOS 10] has been displaying a rendered graphics (looks too blurry and there's a blue tint replace every black colored object and avatars) . I've checked whether it was my screen but it's only occurring in iClassic app. Even when I deleted the game and reinstalled, the same graphical issue shows.
Edit: A few players on iOS 10 are having the same exact issue.