Click the green flag (obviously). The "Start Menu" has all of the apps on a different area, the notepad can only have 5 lines, and you have to start over every time you want to edit something. The Cookie Clicker app is REALLY basic. You can change the "taskbar", "desktop", and "start menu" color in the settings.
I've been "working" on this for a while now, and by that I mean I worked on it about once a month. Tell me what I should add in the comments, 'cause I've given up on coming up with ideas by myself.