Sometimes when I am trying to get someplace, I don't want to stroll. But that's my only option. I sometimes JUMP to relieve the boredom of walking at the same speed. With my new hair that bounces, it's kinda fun. But, sometimes (not always), I would like an option to RUN, or at least walk really fast. Maybe to speed up the pace 25% 50% 200% with concomitant payment for this powerup with loss of energy. Or currants. Don't care.
I would NOT want to have to have an item to spend for this powerup, though. I should be able to do it anytime. Perhaps rewards, though, for exploring more of the game. So after 50 streets you get the 25% option, and 100 streets you get the 50% option and whatever you smart devs decide.