Artwork is great, meeting and interacting with characters (what little there is of it) is fine, all of the 'gameplay' is worthless. It amounts to blind stat-grinding, which is unfun. Your stats can deteriorate, which adds to unfun-ness. Put a character in each class/ activity, and some indication of progress you are making with these characters.
The 'fun' part of stat-grind games is the narrative scenes and character interactions, the point of grinding stats is to see scenes with characters, you need to be able to plan ahead so you can follow a character's route or have enough stat to pass a check.