The main page says you get 4 points per opponent Derkling you kill and 13 points per statue, but the evaluation appears to be using the default reward function for the gym which is 4 points per statue and 1 point per Derkling.
There is a misleading display of points in the replay which appears to be hardcoded in the game, but the true reward function is shown in the small boxes and these values I believe are reflected in the scores.
Also the equation for the scoring appears to be a placeholder. I think you should also mention that the score is averaged over 128 games.
Finally, it would be less confusing if the the reward function used in the starter kit run.py is the actual reward function used for evaluation.