UNDERTALE

[Koh]

I feel like the plain art style lends to the personal and quaint tone of the game's writing. I think if it was flashier it wouldn't feel nearly as genuine and that would be a huge drawback from the game's appeal.

I don't find it "NES nostalgic" so much as "home-made old RPG maker game" nostalgic, and that home-made feeling is practically necessary for the game to accomplish what it does in the story.

I guess it's just me then.  There's nothing inherently wrong with simplicity, but when looking at screenshots/videos of a game, and I see something like this, that's mostly flat colored with minimal to no shading at all, when I've seen things like

Heartforth Alicia


That are just bursting with life and color FROM THE VISUALS ALONE, it's really hard to get into them.  But, like I said, as long as the gameplay can make up for what's lacking in the graphics, who cares right?  Graphics don't necessarily have to go hand in hand with the story; in fact, I find it more interesting when they're actually a foil to the story.  You got these cutesy looking characters, but the story's all about preventing mass genocide from a maniac or something, showing there's more to a person behind a cute/pretty face.