It's not all that amazing, unless you meant it as an amazing example of pareidolia- how our brains are hardwired to find faces into EVERYTHING.
As far as I can tell, all of the images were custom made for this particular reason. Given that, I think the artist could have made a better job.
The metareference is what? Michaelangelo's Creation of Adam? Not sure without looking it up... and not sure what the meta-image has to do with the 20 sub-images that create it.