Custom product preview

Hello. I'm building a magento site for stationery and need customers to be able to personalise the cards with a preview. Certain requirements: - No flash to be used. Personalisation tool needs to be used on all hardware inc mobile. - Avoiding use of configurable products (Dealing with the hundreds of attached simple products is too difficult, plus, as most products are virtual I have no need for inventory) - No styling is necessary. Similar site: [login to view URL] Please view this site thoroughly before bidding. Customer should be able to preview colours for base image, preview their own text, in different fonts and colours. Admin should be able to determine which aspects of the individual cards are editable for colour and upload combinations, also determine editable text areas.