I don't honestly think "age" has a great deal to do with success here. The only physical requirements are to be able to hit your ball at the desired place on the swing meter, and not be blind. Of course how you accomplish this probably has more to do with your mind, and attitude than anything else. Experience will come as you progress, some process that much better than others, and that is the major difference between most players.
For what it's worth. I began playing here in December of 2009. At that time I was well over 70. my nickle