I think Gratuitous Space Battles is a... bad game. There are a lot of really poor design choices, balance issues, and the UI, as noted before, blows.
Here's one of the niggles that really bothers me - ships have weapons hardpoints that are linked into weapons batteries, but the weapons batteries are only for cosmetic effect. Seriously? That could have been a really cool aspect of the game if putting a weapon in a weapon battery slot made it do double damage (for a two-gun battery), while costing less than twice as much, making it a more efficient choice that can't target multiple ships. Then you've got some design space where one race could have very few hardpoints but tons of weapons batteries, for example, or who knows what else.
Far too much effort is put into "making this look cool" without any real design thought behind the game. Another one is one of the beam weapons has a description "There are many different kinds of beam weapons in the galaxy. This one is purple." Seriously? That's the only notable thing about it, it's purple?
The unit commands never work, cruisers are way too slow, etc. etc. It's just simply a bad game.