I believe its only flaw is being short.
But not too short, it just doesn't try to inflate gameplay time with grinding or whatever. It is 'just' what a Visual Novel, by definition, means. Considering the amount of scenes it contains what could be a single episode of a longer game, but condensed and faster since it is focused on one character.
So, we have:
Good visual, as in renders and animation.
Including a good-looking mother, which is ofc one, if not the most, important aspect considering this game concept.
Story is fine, it plays its purpose here.
You do have a few options (although I didn't go back and try all the others ones). But for me that's a good sign, which means I was satisfied with the conclusion I got.
The doctor plus scene/story variation is a good addiction. Gives a little bit more content.
I think this structure could be maintained in future standalone games.
One other thing that I believe became worth mentioning, is that the dev didn't try removing skip (Ctrl, although I didn't test xD), didn't remove scrollback (middle mouse), etc.
Is it the 'expected standard'? Surely. But worth mentioning considering what has been surfacing these days lmao
So, a concise story with enough renders for a quick, but not too quick, VN experience.