It actually looks really cool. I can't really think of anything that could be changed other than some fine details that could add more depth as to what the purpose of the ship is. Depending on what kind of ship it is, you could ad a fictional branding logo on the side of the ship. If it's militant related, you could add some weapons or a large sliding doors on the side of the ship so that is can transport troops, cargo, etc. In my mind it looks like it would fit better in an illustration as a small ship that's commonly own by people. Rather than it being a massive space battleship.
