I'm sorry to hear about the glitch you encountered. Unfortunately, I made the game in less than 2 weeks for a game jam, so it currently has some bugs that I hope to fix once the voting phase is over. I understand that the final part may have been a bit too intense, even though I aimed to use a cardboard-style with very basic movements to evoke the feeling of a carnival game like whack-a-mole, to lighten up the intense situation.
Regarding the leaderboard, it's based on kills and counts the points earned in the last mini-game, plus points for eliminating other participants. It shows everyone with the same score because I never expected so many people to play it, and they essentially achieved the maximum score.
The game is definitely incomplete, and there are many things to improve and fix. Consider it more as a proof of concept. I hope to enhance and expand it into a fully-fledged game in the future.