I'd actually love the same kind of app for finances. It would be pretty easy to set short term goals automatically using Mint or another financial service.
It's kind of a fun concept. Your scores are your money. I suppose it would also be good to have a levels system where you gain xp or ranks for juggling your finances well. You set goals for yourself, do daily tallies that give you a discreet "whistles and bells" review of all your gains and losses. When you meet important goals like making rent this month or paying down your credit card it lets you know what you can go out and buy or do with your remaining income, e.g. "You just paid down INSURANCE today! With your extra cash you can get yourself a BURRITO at UNION BURRITO!"
You could incorporate it with a wishlist so that it alerts when you've got enough to go out and buy that Upper Playground tshirt while still making rent this month.
