I think...if you can make a model in exact same detail out of wooden building blocks, then it probably needs a wee bit more detail.
Experiment; you have a bridge there, for example. So make it look like one; recess a window region (remember you need to plan ahead where you want the textures to go & why), move it to the fron of the ship proper, change the front itself to have some angles, etc.
What i'd suggest, is that you find an existing model, and rip it off; learn from copying the details on a per-poly as you see them on the wireframe (i.e. as shown in modelview), and then you can use what you learn from that to create stuff with a bit more detail.