Click the green flag. Sign in as scratcher. There is no password. ok, i know the thumbnail doesn't look like a birthday project, but I did edit DesktopOS 3 to fit scratch's 10th birthday.
HAPPY BIRTHDAY SCRATCH!!! This OS is a custom made OS for scratch's 10th birthday! (basically it's a birthday card that is an OS) There are some changes to DesktopOS for this OS but I'll let you figure those out.