Just a little something that went unnoticed: on the back cover, the text "Project Chaos: ..." from the left, light side, must be rotated 180 degrees, or it will show up upside-down after the cover is mounted...
Also, considering where the emerald is in this cover, maybe it should also be rotated, let's say, 45 clockwise... then it would be kind of parallel to the lines below it on the sphere...
And about this font thing, I think maybe you should try using a smaller, but thicker font, with that thin outline...
I'm not a graphic designer or anything near that, so feel free to disconsider whatever you want on what I said...