That would be pretty cool. Someone would have to figure out a decent way to keep control over all your units then, though, as they can run around all over the place. It would become more of a strategy game like Centurion on the Amiga, I suppose.
Challenging to make, I reckon, but I sure hope someone will take up the glove!
Not in a line, and a jump option...Sounds like a 3-D game to me. Those are supposed to be extremely hard to program, so I doubt that a flash programmer would make something like that in the near future.