[lena]

That's great that you're adding user profiles, thank you! 15 leaderboards definitely isn't over the top, especially not for an app where improving your score is so essential. You could even add a 16th, 17th and 18th leaderboard for total time across the modes on each difficulty (that would be great, IMO). I own multiple games with 25 leaderboards (one for each level on speedrunners, one for each song for music games, etc), and on gaming forums people moan that that is the maximum number allowed on Game Center because they would prefer more.