This is NOT intuitive navigation. Add text to your graphic buttons. Add graphics to your text buttons. Add more words to your text links. Be as descriptive as space allows.
Most pages are available within one click from the home page.
It's not an accident. Use pull down menus and listing pages to organize long lists or major subsections of your site. Don't make visitors hunt for your information by clicking and clicking and clicking. Often, users are left checking every page the search finds for what they are looking for. This can be a very frustrating experience.