Awesome work so far! I love the idea and the style .

About the parchment : what about keeping it but removing the holes in the map itself?
Concerning the color, I think a dark night sky (with a few stars?) could be really cool and by contrast make the map even more appealing (plus, it would make the scif-fi style text even more legible).
But those are just suggestions & thoughts, it's already great! I hope it's not scaring potential competitors .