Sweet Jebus! I hope we aren't still dealing with Windows by the time we need a Hyper Space Curve Calculator!

The image is great and the map is nice, but the clipped picture of the pen doesn't fit the style. I suggest you drawing the pen using the same techniques you used for the tablet. I think that would unify the image a bit more, as it is the pen kind of sticks out as something "real" pasted onto a bunch of stuff that is "unreal."