I've managed to make it on time, though because of rush it seems horribly messy. That gray-blue thing was supposed to be a heart for instance hahaha.. xD To be honest I'm not satisfied with it. Tons of brilliant ideas for which I have neither time nor skill to do them well enough :/
I made sth similar with etching long time ago, it does not exist in the internet however, so sorry for no ref.
EDIT: Fixed dithering a bit in the heart - at last.