Very cool! The guitar riff gives off a horror country/psychobilly vibe, which immediately sets the mood. Perfect for your upcoming event! I've been playing guitar for 18 years, so I'd like to think I know a good riff from a bad one. 
The vocals are excellent, and match the guitar perfectly. I think she has a ton of potential for a 14 year old! From listening to her vocals, I can tell she has a great ear, and would probably be very good at picking up any instrument and learning it on the fly. I hope she already has a singing instructor/coach to help push her limits, and perfect her craft!
Best of luck to the both of you.
The vocals are excellent, and match the guitar perfectly. I think she has a ton of potential for a 14 year old! From listening to her vocals, I can tell she has a great ear, and would probably be very good at picking up any instrument and learning it on the fly. I hope she already has a singing instructor/coach to help push her limits, and perfect her craft!
Best of luck to the both of you.