Deltarune Chapter 1 is by no means as good as Undertale, but what do you expect, it's only a small chunk of what's to come in the future. In my opinion, the characters aren't 100% likeable, at least not until Chapter 2. Susie is a total tryhard jerk, Ralsei is literally only fanservice, and Kris... is just Kris. The only character I enjoyed was Lancer. With that said, the game is still incredible. The music, as expected, is amazing. The graphics are a huge step up from Undertale, and it's definitely worth playing. Chapter 2 100% fixes all the flaws the characters had in Chapter 1, so I will totally recommend it.