Oh man, I'm so sorry
I'm not all that familiar with Devianart and I never saw your reply.
By now I have a cover, made by a graphic designer. But if you're still interested in hearing about the project...
It's a mystery/thriller. It follows 2 brothers on the run from something. When they stop at a motel, they figure that they're safe. But soon a dead body shows up, and they get trapped, along with all the guests and a rookie detective.
The story follows the twins as they try and hide their past and the detective as she tries to stop the murders going on and to stay alive in the process.
Right now I've got the story entered in an online writing competition.
www.inkitt.com/stories/15501.
Feel free to check it out.