Markup Review

Picozu is an online image editor that uses the canvas element and other HTML5 technologies. Appcache is used to store images used in the app’s skin for offline use, and localStorage is used as part of the Facebook integration.

In the markup the menu element would be a good choice for the list of commands used, possibly with toolbar set as the type. There are also a couple of type attributes in the script tags, but other than that a very smart piece of web development.