Html5 Canvas App Customization

I purchased a html5 canvas app via this link: [login to view URL] I want to transform the app into a "virtual try-on" app where user can upload their photo, select the eyeglasses frames and see how they look in those frames. Therefore a reskin of this app and some modification is needed. Reskin: I will be providing the PSD/Assets, you will have to reskin the app in accordance to the new design. This includes changing the resolution of the app. Modification: I would like to add a new function and customize its existing feature. 1. User can only use one sticker at one time. 2. There will be more than one layer of categories. 2. When user put on one sticker, a button will appear which will open a new browser tab and link user to the specific product in my e-commerce website. So I am looking for someone who has experience in html5 app, particularly canvas app to do the modification work. In depth discussion is needed. Let me know your thoughts.