Sorry, didn't realise it was hand coded.
The menu works ok for me. But I'd rethink your navigation structure. The menu should have a 'home' links, the 'about' can go in the footer and I have no idea what tech-tutorials' is for. Why this category and not all the others?
I looked at your preloader tutorial - and while very clever, if a site needs a preloader there is something wrong with the site. You should never have to see a preloader. Ever.