51 karma · joined February 7, 2013
Creating personalized mobile games that teach kids to read.
web: www.knowbilitygames.com twitter: @knowbilitygames
Odesk (odesk.com) also has game artists, although the quality is all over the map. You can post a job description and review the portfolios of the artists that respond to find a good fit. They allow you to do a short "working interview" project, too, where you have the artist spend an hour or two creating a piece or two of your game art so you can see how well they will execute your vision, how they are to work with, how fast they can produce, etc.
I haven't used twitter to find game artists before, but I'd image if you look for the right hash tags, you could send out a request for available game artists and get some responses from available folks.
Good luck.
As a game dev myself, I'd definitely love to hear more about the custom engine you used and why you chose it over the other options on the market (like Unity, which you mentioned).