Certainly! Just add $20 USD for each extra copy and keep the same tier. It'll also help to leave a note in the backer survey to remind me what you're buying. Please note that depending on how many copies you order, there may be a delay in the shipping time.
Post-Kickstarter, polishing and printing the final game will be my top priority. Once that is finished, I'll begin work on the digital rewards (papercraft toys, artbook, comic, etc.). The final rewards will be delivered on a semi-regular basis, but don't expect to receive any digital goods until early summer 2016 at least.
This is the specific wallet that I'll be ordering for Tiny Swords! Imagine this, but with a cute Tiny swords logo on it. I've been testing it out on my own cards, and they've survived quite a bit of travel, so they should be perfectly safe for yours.