Hello, and thank you for the feedback. I feel that most of the complaints you mentioned are largely a result of how you chose to approach the game. I can say with confidence that the players with the highest scores did not try to avoid fighting the enemies. While fighting the enemies does require more skill, it also ultimately leads to a much longer survival time.
As for displaying the score after a run, you are absolutely right. I only implemented the scoring system during the last half hour of the jam, so I unfortunately did not have enough time to create a proper ending screen.
Thank you for playing the game!