The game REALLY needs to mute the music while you're in the plumbing minigame.
Other complaints: None of the tutorials in the manual forging minigame work (which would really be great, since the minigames are so... odd), I have no clue what the dormitory is for, the "upgrade" system where you feed them food seems awfully underpowered as far as I've seen, and that "summer event" thing doesn't do anything (though it looks like it might be a placeholder, IDK.)