The goal: a nicer-looking web site.

The rules:

1. No S/FTP uploads to the server. You can use the Media Library upload for allowed file types only.
2. No custom themes or plugins. You can install themes and plugins directly from the WordPress.org repository, but not via Upload Plugin or Upload Theme.
3. No file editing. You can use the Custom CSS module from Jetpack, but not the theme or plugin editor.
4. No outside programs. You can only use your browser (and any useful sites you visit) for image editing.