First of all, this is not a professional product by any stretch. The wording is extremely casual (i.e. "shooting things") and addressed to younger player. Grammar is faulty enough for this foreigner to take notice and there are more than a few typos. Rules are vague enough to be a rule lawyers dream. Last but not least, the illustrations look like photos taken by camp counsellors.
Second, this game looks like it has been designed with the input of 12 years olds. And that's not a bad thing. The influence of video-games are evident in the setting, the structure of the game (big bad guys are called "bosses" and even a character class which looks like Mario Bros.
This game would indeed make the basis for a great event in a holiday camp.
Thirdly, the game setting is based on the particular views of one minority religious group. Of course there's no reason you should keep to their setting, imho, but if you are easily offended by that or concerned, you'd like to stay away from this game.
Had this game been promoted as a fun, friendly game by a few wacky and imaginative kids I would easily have given them 4 stars, but as "professional" product I can't rise it any higher than 2.