Took some time to figre it out I kinda couldn't figure out why I kept randomly losing and just went pure madman on it slamming crossed down like crazy and smiting constantly, eventually I hit S tier XD
Viewing post in Full Metal Nun jam comments
It's probably because player hit feedback is too subtle and it isn't obvious you've lost Grace (the timer) or indications that the timer is near running out, that'll be something I'll be addressing in a post-jam update. I'm glad you had fun though smiting enemies and even getting S-tier, congrats and thank you for playing my game!