The artifacting here is ridiculous! o_O I'll reiterate: jpeg = BAD!
You definitely need a light source. I would suggest the top of the screen. As far as design goes, I think the ship would look cleaner if the top were angular rather than smooth all the way across. Also, if this is a shooter, where are the guns??
I think it might be more interesting if you added a couple to front of the ship. Also, does it need to be so... stout? It doesn't look all that aerodynamic....
Have an edit!