I would recommend downloading the existing Windows client to get a feel for the game. The two screens I'm requesting are Kingdom and Travel. I have included these two as screenshots if you can't run a PC application.
The Kingdom tab is an overview of your empire. This will be the landing spot for the app once they log in. The sidebar on the right contains vital information about your empire: movement points, castles, land, etc. The main part allows players to adjust tax rates, buy/selling Castles, etc. The lower part houses the vault, which is where magical items are stored.
The Travel tab is where players move around the world. Instead of a drop-down list of destinations, users should click (or tap) the cities displayed on a medieval style map (possible weathered, Compass Rose, etc.). Travel to other continents (there are 3) should work in a similar fashion. Each city contains a different market place and a way to view this should be included.
Not all information may fit on a mobile device, so linking in an intuitive way will be important.
Additional screens may be requested after this contest ends; I would like a total of 3-5.