The stuff on the bottom is it in space, and its the stars I think...
I like it but it looks like it is stationary but the background is moving...
I love the design on the ship. It looks a bit like a plastic toy, which is cool. But I don't really understand what that stuff in the botton is? Also I'm not too keen on the thrust fire. It's a bit confusing.
I think you should either have fire coming out he back of not, and let it stay that way.