It's fun! I think my score was 16 or 28, not sure since I don't think the score resets properly. You sort of get a feel for how to manage the ghost and trap him on walls, and it's satisfying to get away from the close calls.
I think it was that in a game, the score counter would reset to 0, but the game over screen was showing an accumulation of all of my previous scores since I opened the game.