Ended up picking this up.
"Undertale Inspired" is the understatement of the century. I'm only at the first town but this is just top to bottom trying to replicate Undertale's gameplay and humor. And from what little of the story I've experienced so far, it seems to be hitting similar beats.
The brand of comedy is the "omg so zany whacky" style that Undertale had, but dramatically cranked up. Some of that humor was questionable back then and I can't say it's aged any better.
I'm gonna stick with it, maybe it'll turn around. But I'm kind of disappointed in how derivative and unfunny it has been for me so far.