I've been working on a novel that is Science Fiction with characters whose ages are more for Y/A. When submitting should I submit it as Y/A, Science Fiction or Y/A-Science Fiction.

It really doesn't fit well in regular Y/A other than the characters ages. The story itself is Science Fiction, with Fantasy undertones.

When asking for critiques is where I've had the most trouble with this. Some people want to critique only Y/A not Science Fiction, but since it's a little of both, I'm not sure what to say when I find someone to critique it.