Since the contest comes to an end and i wont have any time left for experimentation. I would conclude on what i learned and what i would improve for a "Version 3". The change to smaller SMD components, staying on one layer and mostly, making it GOLD were some huge improvements already. But there s still some way to go:

First, the circuit:
I didnt have a lot of time to experiment with the energy harvesting function. So no lighting up when reading. however, when you place your phone in front of it you wont see it anyways so its quite a useless feature.
It would be much better to just connect the 2nd GPIO to the other eye so you can control both eyes individually (*sans theme intensifies*)

The Art:
As already seen in an earlier log, the solder mask and silk screen didnt work as wanted. That would be an easy fix.
Also i would try to find some solution to maybe block more light between the traces of the coil.

The Print:
Ok that one is self explanatory: BLACK SILK SCREEN IS A MUST!
But since i wanted to produce the prototypes in europe i went with Aisler. And they only do black aver a certain number of pieces.
Also since doing this is quite expensive over time (the golden revision already broke thebudget i planned for this) and its not a sponsored project .... oh well ... 

The "after con feature":
I would personally remove the keychain hole and make the pin-spots diagonally for more stability. I have the feeling the use as a pin would be far more likely. (Also AESTETHICS)

Also the "standard SAO-conector" as THT is terrible on this one. Residue makes the shiny ENIG dirty and one small mistake and you solder on the plane. This also makes removing the Connector a hassle and it looks weird.

I would totally change that to a compatible SMD solution. Aestethically and production wise the much better route to go