What's this Candy theme?
GTK+ theme is based on Flat-Plat theme.
Shell theme is based on Adapta theme.
Android Jelly Bean styled "Show Applications" icon in dash.
How to use?
Extract it and copy "Candy" folder to the theme directory.
For system-wide: copy Candy to /usr/share/themes/
For user-specific: copy Candy to ~/.themes ( if this folder was not exist,create it:mkdir ~/.themes)
For ArchLinux user: see aur:candy-gtk-theme ,you can use aur tool,eg. yaourt - yaourt -S candy-gtk-theme
Use gnome-tweak-tool to change the theme.
Arch and other distro base on Arch :yaourt -S candy-gtk-theme