It's Lord of the Flies but with way more cock jokes. I can see why a lot of folks wouldn't be into this movie, but I thought it delivered exactly what it promised: A low-budget/not-that serious teen comedy that pokes fun of the whole "trapped-on-a-desolate-island" story. It's a pretty low-brow comedy, so if you aren't into silly/kind of dumb humor, give this a pass. But for those that like cheese-ball teen comedies, I think you'll get a chuckle or two out of this (I did for sure).
Here's just one example of the type of humor/dialogue: "Some people say I'm an overly needy skank, but there's nothing wrong with always having a boyfriend, right?"
On top of that, you see Chris Kattan wailing about peaking as the high school quarterback and how the future is shit. I'm sure this has no relation to his post-SNL career.