This game is clearly inspired by Undertale, and most of the game puts enough of a spin on things to not feel too derivative, but in specific moments it really does feel like it borrows too much. ...That all being said, it's still a really good time! The comedy in this game is really chaotic in a great way, and the battles are quite challenging. The music is particularly good, and a lot of the characters are very likeable.

While I think it gets a lil demoted by being too derivative- if you liked Undertale but wanted more of a challenge or thought it was too sappy/cheesy, this might be a better fit for you!
(P.S. I love you Thunder Goober, even if you gave me IBS.)