A high score is read as the urge to be measured and to come out on top. Seeing your name on the list traditionally speaks of pride; seeing it pushed down, of rivalry and comparison.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.