Don't feel bad, neither do I ! No one ever explains those high scores on any of the games. Us older folk don't have eyes and fingers that work fast enough, if that's what it takes.
Is Mike a computer? I agree--the scores on the Leader Board must be made up. I have gotten on to one leader board with one of the card games but always at a low score and am knocked out within minutes. I don't understand the scoring on the games but continue to play them. I play against myself to better my score and keep my brain working. I don't think the scores on the Leader Board are realistic so please do not stress about scores. Just work the puzzles and games to better yourself.