I am running 13.10 and installed GNOME 3.10 with the gnome3-next ppa from Team GNOME, as explained in an article on Webupd8.

How can I get back to Unity?

I did a ppa purge and now sort of have Unity back, but still have the GNOME boot screen, the font, the close button for windows on the right side. Also if I minimize an application, Xorg and the application have around 100% CPU usage.

I also tried sudo apt-get install unity and sudo apt-get dist-upgrade, but it's already up to date.

I have my home folder backed up with Déjà Dup, but I would like to avoid reinstalling and reconfiguring my whole system.