I got my hands on this book expecting something different, and sadly ended up disappointed. Might be your cup of tea if you're looking for an easy quick-read, but i found the vocabulary overly simplistic and the plot weakly thought through (which was a recurrent feeling with many other aspects of this book). 
It was settled from early on that all the characters in the main cast had a clear motive except the protagonist (who even questioned her actions several times along the novel, admitting she had no reason for doing whatever she was doing. In the final chapters the author attempted to give her one but it felt vague and made little sense).
There is a hint at some kind of romantic relationship being possible between two characters at some point, but their relationship lacked chemistry for me (which was expected if characters were thrown on an island with blood-thisty beasts wandering about, expected to survive. That made the whole 'sudden spark between them' difficult to believe).
I do think it was targeted at younger audiences, but at first glance (especially looking at the cover) it didn't seem like that to me.