Is there a possibility of a “Max Level Award” feature that would persist through account reset? Could be very simple, even just a badge, but for people who want to get to 60 and then reset and relevel, something permanent to indicate their achievement.
Of course what would be really amazing is New Game +. When you get to 60 and reset to 1, it unlocks a new mode. Maybe faster timers, maybe more unlocks, never-burn mode, something crazy for the next level of challenge xD