There are lots of bugs in the game. There are times when I hit a Kingpin for a very high score in the summary, but get a ridiculously low score on the leaderboard. Also, there have been recurring moments, after hitting a Kingpin and Raids, that the game just stares at you until you forfeit via the exit button. Recently, I was given an under-100-gems reward in Raids despite have well over 2K gems. My advice: save your frustration and money.