what if there were only 1 currency (money) and it paid for everything, shoes, extra energy, cars... and then if you really want to, you can buy extra with kreds.
I don't play flash games to spend money. That is what I have a PS3 for
great and fun game, but there should be a way to get more shiny besides paying upwards of $60 or the rather infrequent mushrooms. Maybe have a daily lotto addition that gives prizes (small amounts of resources most of the time) and the prizes have a better chance of being better the more days in a row you go. A max prize of maybe 1000 shiny or something like that...