Not as original as you think...but still
You know what this game reminds me a bit of? On the Flash Flash Revolution site, they have this other game called Spin it Up, which has simliar gameplay mechanics (hitting targets spinning around a circle like that), but I doubt that you've heard of it so I'll let you slide (or scratch... :) ) on that one. But, Spin it Up only has one circle, this was an interesting twist on that idea (with the whole 2 turntable idea).
Quite fun, but still in a way, original.
8/10