I have two suggestions/requests for the game (which i have really enjoyed):
1. One part I like is that you can use "loans" to help buy ships and buildings, and then pay them back over time. I was wondering a page could be added to the domestic screen that would allow you to see all outstanding loans (amount and how much time remaining to pay them back). Also, I think it could be useful if you could pay back loans early.
2. The second thing I think would be useful would be an "out of game" ship designer. This could allow you to manage the different ships you have designed (adding/deleting). Also, it would be nice to have all the ship techs available, so you could experiment with different designs with out having to start a new game.