If you ran the file that you got from this site then that is only the extractor, assuming that you clicked through everything then a folder will be created called "DesktopGoose v0.3" it will be towards the bottom as for some reason 7zip archives preserve the original creation date, inside that folder there is a file called Goosedesktop.exe (the one with the green icon) this is how you start it, to start it more easily you may want to create a shortcut and put it on your desktop, the closegoose.bat file is a way of stopping it, you can also use task manager or by holding the esc button, this will close the goose, to get it back simply run the Goosedesktop.exe program again and your goose will return
Hope this helps