Hey - aren't you going to put Satoshi's face on it?

To me, the font for "Bitcoin address" is hideous. It looks like you wanted to go for something "classy" and it shows. It looks Russian or Greek, not particularly "global" or "cyber" or "digital".
That back of the note is a wasteland. How could you design a note and leave all that real estate barren? You could put anything there - anything inspirational you like - and it's left essentially blank.
Take some inspiration from there:
http://neatdesigns.net/worlds-25-most-beautifully-designed-banknotes/Variations and detail subtly blended.
And even these copper round that are knocking around - they do a decent job of capturing the digital-ness of what Bitcoin is:

Look at all that detail! Use the whole canvas my friend

P.S. Don't forget the rule of thirds. And *blend* the QR codes and numbers into the design.