So long as you tell a story that falls within the fairly generous boundaries of the suspense novel, you're free to make the novel as good as you can. You're allowed to challenge the reader. You can experiment with voice and style.
I started writing stories in sixth grade. But writing wasn't cool, like being good at sports, or being part of the in crowd, or winning fights on the playground.
As a writer, I'm convinced that encouraging children to write fiction, to hook into that marvelous machine called the imagination, has to be good for everyone.
Good riddance to bad rubbish.