I think I used PTEMH9T4YPFE. Great game. Very good implementation of Alchemy. It needs a mode for us lefties.
Wow. I actually got a code! Here's the one I used: HPYM69J93FLJ. I started from the bottom of the list, so anything above that may still be available. Thanks for the code!
This is really a neat game. I wasn't expecting too much but I got a really interesting, original game. More importantly it was fun! Highly recommend it.