Young adult? um, no.
Just no.
Despite the impressive vocabulary this is most definitely a children's book. Not a young adult book. You can't expect just because the author uses big words, suddenly the whole book should be marketed towards YA.
That's just not how it works
Yes, I absolutely admire this girls talent. Which i have no doubt was encouraged and developed with the help of her English teacher parents. She may have written it, but you can't tell me her parents wouldn't have read it and given her their professional advice and good editing services. Because why wouldn't they? She will only improve her craft with practice and with time and I imagine we will see quite alot of work from her.
But in terms of what it is and how it has been marketed, somewhere you have to draw the line.
Was this a good book? Yes, if it were a children's book it would have been. But as a young adult book? No, it's too immature.
There a examples of why this is scattered throughout. One of them being the use of a 'code of conduct' as a means of resolving society issues such as unemployment and crime.
The narrator clearly says, the town has solved all of its unemployment and antisocial behaviour through strict rules. What are these rules? To wear nothing but dull colours and the architecture for all of them homes are all the same. That's literally all that it says about the code of conduct. Nothing else. Nothing about how else they stop crime and other bad things in our society.
Now, does that sound even remotely logical? No?
No, I didn't think so.
Another immature notion was that a villain was defeated simply by throwing cakes and deserts in his face. Sure, that sounds reasonable to me. How doesn't want to be defeated by children with either terrible table manners?
Putting that aside, I will note that this book was a mash of pretty much all popular children's literature possible. This including Peter Pan (as marketed), Alice and Wonderland, Miss Peregrine's Home for Peculiar Children, A Series of Unfortunate Event, Harry Potter.
How do I know this? Well, I mean, did you read it? It has small unattentional references. Such as a flemgo from alice and wonderland, and a lady that seems alot like the Queen of hearts, the house is named very similarly to hogwarts from Harry Potter and so on.
So does that make it original and interesting? Eh.. not really. But I wanted to know where this was going since I was truly amazed at such a young age this girl did well in description and writing
But again, there is no doubt in my mind this should have been a children's book. Not a young adult.