What do you guys think about adding a new category similar to what is done in Pac-Man where timing ends upon beating the 'high score'? So, timing would start upon pressing start and end upon getting 50000 points.

nope, im sure there are score sites out there dedicated for that kind of stuff. Here we're interested in beating games fast. Not do 100 jumps as fast as possible with a timer or who can game over the fastest with a timer. Score categories like that on SRC mainly exists in the first place for certain games that doesn't have an ending, they exist because people still love to play the games and there's essentially no other way to go around "speeedrunning" them. But here we have the option of beating it from start to finish.