I'm actually considering doing a Udemy course since so many people have asked for the Word Search game. Obviously I don't want the market flooded with games just like mine :)
The artist is Mark Quire, I actually found him in the Wanted/For hire forums. He did a lot of the artwork in my upcoming zombie game too. He's awesome, but he was actually just contracted to do a game from scratch on his own, so is time is pretty spent for a while.
I have a few others I have used too. I found them on Odesk, which is a great place to find artists as well.