Here's a free Minecraft survival games thumbnail I made: http://www.mediafire.com/download/ebwsy ... G_icon.pdn

Feel free to use it however you wish.
By the way, I left it as a PDN so you can add your Minecraft character into the thumbnail. You'll need something like Paint.net or Gimp to open it.

You can get either one of them here:
http://www.getpaint.net/
http://www.gimp.org/