I'm sorry about the score. total score is total health at the end minus initial health you chose. So, basically you have to finish the game while dodging and collecting health points as many as you can. if you chose 5 hp initially and end with 5 hp, then you get 0 score. I agree it's kinda unfair and we should give some score for completing the game but we didn't have time to make a better score system. Thank you for playing and enjoying it regardless of the score!