Alrighty then, my first thought:
That first post you have where you explain all the rules, regulations, and physics of your world? Delete it. You should be teaching that to us in your story, not outside of it. This not only gives you the freedom to make alterations to the rules without having to edit that post, but it also forces you to develop a lot more from scratch. You should know this world like the back of your hand, and that should fluidly transfer over to the reader as events unfold.
Also, I have a problem with a class of ship being named "Corvette." It's too awkward. Like naming a naval ship the U.S.S. Ford F150.
Alright, onto the story:
First off: you need to work on setting. Right now, I don't know where the characters are. You obviously have a good idea of what's around them, but you need to show us that. Before all of the fighting, character dialogue, and all that, you need to give us a portrait of this place we're in. Is there an advanced weapon in a glass case somewhere? Does the navigational officer have to sit on a loofa because of a phazer wound to his arse? Does Zeth have a coffee cup on his chair that says "I <3 Coffee?" Things like these need to be shown to us if they're going to be used in the story.
That brings me to another point. You need to show us what the characters look like. My rule of thumb is to pick three perfect details that show more than they show. Does Zeth have a tattoo under her naval that disappears ever-so-sexily below her waistband? Does she have an eyepatch? I don't know what she looks like in the beginning.
(Sorry for all the harping, but this is what I love getting in response to my fiction.)
Mm, at a sentence level, things need work as well.
Quote:
Eyes widening, the princess nodded slowly, her eyes betraying her terror and fear.
Quote:
Taking out a grey crystal, Zeth made...
Quote:
Nodding slowly, her mind still not comprehending what was happening,...
Starting a sentence without a subject can drive readers crazy. For one, nobody talks like this. It doesn't sound natural or look natural. This sort of writing was only popular in Victorian literature, and it makes this story appear very writerly. You don't want writerly if you want your readers to believe in you as an author. The third sentence that begins with Nodding, you do it twice. The longer it takes us, the readers, to know who is doing the action, the more apt we are to get confused and have to backtrack. I do it too sometimes, and I have to rearrange things.
Also, you write a lot of "she yelled, murmured, demanded, or voice rang out" and "said pleasantly, confidently, angrily." Dialogue tags are meant ot be invisible. You should be conveying all of these extra adverbs you have in the dialogue itself, and with the actions your character takes before the dialogue begins.
-- Sarah's back scraped against the damp bricks. She knew she was cornered. A pile of loose trash to her right, the dumpster to her left, and the wild grin of her attacker warding off any escape. "Please, don't," she said.
Sorry, I whipped that out of my arse just now. Even so, you can tell by the frontloading that she's not yelling, or demanding, or stating. She's scared [censored], assuming rape is on the way. She's going to be whimpering. The audience should pick up on that
as they read the dialogue, not after.
Those are the main points I think you need to work on. Beyond that, the story's all your's. Good luck, mate, and hope I helped! :)