If the first test is: "can the person write", then you have passed that test. It is clear that the writer knows his world, his characters, and what he is doing with them. The dialogue fit the tone of the piece, the action scenes were clear and exciting. This seems to be some sort of fantasy world in which monsters and beasts intermingle with local politicians and stupid horny teenagers. That's fine. I don't know where this is going or whether it will make any sense onscreen, but I have no dount that the same could be said of a person initially reading the scripts for STAR WARS, BUFFY, HARRY POTTER, UNDERWORLD, or LORD OF THE RINGS. Those all worked out fine. I can't otherwise critique these 15 pages... if the rest of the script works, then they're fine. If it doesn't, then I doubt the first 15 pages were the issue.