Now i'm working in 3 direction: DG car(times faster than usual raycast car), buoyancy(physic of the bodies that falls in the water) and character controler(we would be able to create person control physic).
Next steps would be different examples of cars(after basic DG car) and ragdoll (after character controler).

I really want to finish this as fast as possible, but i haven't enough time (and, sometimes, knowledges).