I LOVE THAT GAME. Original and brilliant, even to this day. Sure wouldn't mind a modern remake/sequel that gets rid of the input lag, has online multiplayer (never mind that the existing game can use Hamachi or something of that nature), and adds a custom arena editor, among other things.
As for my progress...well, I didn't spend too much time with Rocket Race or Rocket Ball, but I did beat Referee's Revenge legitimately, as damn near impossible as that may sound. Multiple times.
I haven't installed it on my Win7 machines again, though. It just doesn't seem to like CPUs of around 1.5 GHz or more in terms of the input code. The game itself runs silky-smooth, but that doesn't mean much when your inputs are randomly lagged, often screwing you over.
Perhaps a Win98SE virtual machine would do the trick...