It's better than most of the cuby builds I have seen, but still it isn't good.
Please remember:
-SpaceShips are NOT cuby
-It doesn't matter how much bricks you use for it, don't use big bricks (like 1x12x5)
-Use mainly ramps for (outside-)walls too, walls made out of ramps look better
-SpaceShips look like floating boats, they have the same shape!
-Don't use the same color for the whole outside. Better use multiple Greys, a light grey as a main color.
-Make the underside of the ship round (not completely of course!), with a dark/slightly dark color.
Hope this kind of helps