Okay, being the site curmudgeon, I'm compelled... nay, required to ask this:
So, you play backwards, at least backwards in reference to the norm... I'm wondering how things work for complex time signatures. As I see it, 4/4 time would be easy. 2/4 still okay as you must play it as 4/2 time. 3/4 time, as played by you could make for some interesting polka's, though... you know, 4/3 time in your lingo...
Jazz signatures must require a degree in quantum physics.