Thanks for the review. You are right about the merfolk, it is because of the conflict between one of the plugins and "Abort Battle" command. It was intended that if player can reduce 10% of Merking's HP then the battle is aborted, and the game returns to the story mode. Unfortunately we just knew this after the last minute of the submission.
The Kraken uses Dragonbones which, I don't know why, gives problem related to mouse clicking like you said.
The story presented here is only 15% of the full story, so hopefully it will make more sense once the full game is released.
The battle log is also problematic as most of the time it's in normal speed, but sometimes it goes too fast. I assume it's related to the setting.
Thanks for all the precious inputs, this is our first RPG maker game jam we join, and we're planning to release this as a full game. Your inputs are worthy to improve our game.