Toby Fox is known for being able to create extremely well-thought-out games, and Deltarune is no exception. Currently, it's free to play due to it being a demo, but it's still worth checking out. Deltarune is an outstanding game due to its incredible storytelling, well-written characters, and wonderful soundtrack.
Although Deltarune is an unfinished game, it has a lot of potential! Deltarune has excellent world-building skills and great character development, with only two chapters! The game mechanics are easy to understand, even though it may take a few minutes to get used to. There are some instances where you step somewhere and accidentally trigger a cutscene, or you forget to save your game and lose progress, but the game's content makes up for these small mishaps. Deltarune's soundtrack is marvelous and adds so much more emotion to the game. Emotional moments in the game are heightened tremendously thanks to the soundtrack.
Overall, I 100% recommend Deltarune to current or past fans of Undertale or anyone over the age of 10 who can read. The soundtrack, characters, dialogue, and overall story are immaculate. This game was truly an amazing experience.