Here's a few minor suggestions that I think would make the game look better:
1. Make the world map more interesting. Draw mountains forests and islands where they should be!
2. Behind the text for dungeons have pictures of the dungeons. Like for Hexx ruins have glowing ruins sunk in the swamp behind the text. Or a dragon breathing fire at a hero on a different island for dragon isles.
3. Add more tilesets in general! (One for each vicious dungeon (underworld, library, city) and ones like village for gnome and halfling villages)
I don't mean to sound demanding, but these would make the game look better in general.