Skinning 'Tech Crush' Game

I'm trying to skin this Match-3 style game however the image source is being written by the javascript and its kind of throwing me for a loop.

Here is a link to it: http://ift.tt/1CK3DjT

var logoSource = "data:image/png;base64,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 etc etc ";

Any help would be awesome. Thank you.