I loved the idea of playing with the trope of "the chosen one" and putting an elderly woman instead. But the execution wasn't as good as the pitch: the main idea and character felt under-exploited (a teenager takes over mostly), and I could see no real evolution in her. Some characters weren't very useful and some lacked depth, being just a bit more than a name, while becoming important in the end. The writing was good enough, but there's only so many "fidgeting with the hem of their t-shirt" or "hugged herself" or "her hip hurt badly" that I can take. All in all, some nice and fun ideas, but maybe it could have gone really into parodying the genre, or on the contrary, be more serious about it all, avoiding cliches, repetitions etc.