Wow
The Concept is fantastic! Two balls, two paddles a player.... for some reason that variation never occured to me, but it works pretty good.
I say that you should at least give a choice to control both paddles with the keyboard. It's a bit confusing working with a mouse for one paddle and a keyboard for the other, since they operate differently and are both doing similar things... or something.
A great variation on an otherwise tired game.