It's really hard to see a missile in this, for the longest time I saw a sword. I guess the 'hilt' is the missile, but I'm not sure what the big gray pointy thing is, or the blue spiral around the exhaust.
But the biggest problem here is, it looks like you don't have a
plan for this piece, you're just adding separate elements next to each other. I'd suggest to sketch on paper first what you have in mind, preferably many versions, until you get a clearer idea of where you want to go with this. Look for reference images too.
Here's an
elaborate example, of course you may aim for something simpler