Thanks for playing! Yes, I'm not much of an artists, haha. If I ever expanded this to a full version I would definitely find an artist friend to help out in that area.
My guess is the duplicate bug you saw was a consequence of the fact that new hexes will generate even if you don't use the old ones (as long as you pull them off the generator and drop them *somewhere*). My guess is you clicked on a hex and so it didn't move, but it was technically removed from the red generator. Regardless, that whole behavior is weird and unexpected so it's definitely an area that would be fixed in a full version.