OK, let’s make this a bit more scrutable then.
At its heart, the scoring system will give you points for doing good things, like finding the magic +1 toothbrush, and penalize you for doing things that aren’t so good, like being turned to stone while watching America’s Next Medusa. There are a few additional tweaks - for example, your score isn’t entirely independent of the other parties - but essentially, that’s the underlying system.
The tricky part, of course, is to assign an appropriate value to each of the components that make up your final tally. In the past, this has worked fairly well, and the rankings of the groups has more or less matched the eye test. It only gets murky when two groups have practically the same degree of success, such as last year when the top two parties were virtually indistinguishable from one another. In that case, the winner can come down to quirks in the scoring system, and there isn’t much that can be done about that. (The only solution I can see would lead to a high number of ties, and I don’t think anyone really wants that.)
In other words, it’s not an exact science, but it does try to be as impartial and common-sensey as possible. Good luck!
(Note that once again, there will be no individual scoring. You will not be competing against the other members of your party, or against those playing the same character at other tables, because I believe that such dual objectives are inherently flawed.)