(2) I think asking for a rating after every game is backfiring on you. People are angry about the flippers and the lack of rules, then get annoyed by being asked banks and again for a rating, so end up reviewing you negatively. It might be worth it to decrease the frequency of ratings requests.
Agreed. The iOS market can be impatient, fickle, or even plain cruel. At the very least, many iPhone gamers have a very short attention span. The reviews will probably never truly reflect the quality of your product and a few stars less can turn away many potentials.