Ah I needed space for the solar panels so that all these people on board can have their iphones charging whilst in space. There was a dome with a swimming pool originally on the top, but after another cruise ship was attacked by pirates they pool was replaced with guns, and now people have to use the inside pool.
You can fly the ship left and right but they turn really really slowly!
This build has massive performance issues when you stop flying, I think thats Unity's way of punishing pilots for abandoning their posts.