"World 4 You″

Well, I wasn't talking about who likes what. You asked

I don't understand how some people manage to complete the game quickly, starting with zero resources,

and I just gave you some material to consider. Seems like you're interested.

And I agree with you about having to wait a long time for the opponent. That's one of the reasons why I don't play anymore. The second and main reason is the length of the entire match. Time just flies by.

A quick rush against the opponent for a high score at the end... I don't know...

The computer as an opponent in offline tournaments is not taken into account (and actually, not in online ones either). The opponents are people who also play the map from the same save so that they are on equal footing. That's how the competition is held between them. Whoever kills faster (or completes another task) is, accordingly, better. So, the record here, as you already understand, has nothing to do with those 500 points.