Custom menus for a wordpress portfolio

General information for the website: Portfolio for interior designer and builder
Kind of development: Customization of existing website
Num. of web pages/modules: 3
Description of requirements/features: Ultra simple wordpress portfolio with navigable full screen background slideshows on pages (one already established but needs navigation buttons and arrow key function), a flyout menu for navigation between pages (see mockups for all design details), a flyout text description on each project page, and an info/contact page with a different slideshow/text configuration. I also need to use a custom font which is already in place, but could be improved on for performance. I'd also like the code smartened up and a simple mobile version please!
Extra services needed: Customization, Optimization
Specific technologies required: PHP, Javascript, HTML 5, CSS 3
Extra notes: Site to be modified is http://elsmereprojects.co.uk

previous portfolio I'm updating is http://design.bernardelsmere.co.uk

Fee is negotiable. make me an offer!