Site tablet (iPad) optimisation - repost

I have a shopify store that has rolling backgrounds when you scroll down the page (homepage) and bottom section of each page. I need to make the images either smoothly scroll up when you scroll down on the page on the iPad or make them static on a mobile device. Currently it doesnt display very well on iPad. And the site is not scaled right for the iPad. Also, when the user makes it a webapp (adds to home screen) I do not want links opening in safari. Currently when you click a link in the webapp it opens up safari. Freelancer must have an iPad for optimisation checks when they are working. Store password: beta05 [login to view URL]