I have 13.04 install how can I revert I am not liking the new gnome here is why.

The rectangle on minimizing.
Top bar is very empty why make 2 panels?
No hot spot.
Also this looks like a fork.

How do I revert to 12.10 with out the new Gnome cause its lame and boring just when I get used to the real gnome and like it it switch's to a wanna be mate version.