Yeah, I'll admit I went in Undertale already knowing about the different routes, although yeah, in the beginning the game does urge you to not actually fight and kill anything. It's a stark contrast to most other RPGs where grinding by pulverizing all the monsters you face in random encounters is usually rewarded by EXP and money and is normally a good thing.

I agree that there's a lot of great music and that's where a lot of the charm of the game comes from. Not to mention the very memorable cast of unique characters.

But yeah, to anyone who really liked Undertale, try Omori. It has a lot of the same vibes as Undertale and I enjoyed that game a lot, too. And that game also has a lot of great music and charming SNES-style sprite graphics.