>>6302233It's a good game. Not a bad game, not a great game, just a good one. But the soundtrack is legitimately great, and it came at the exact right time for nostalgia to hit in for the target demographic. And nostalgia is addicting to these people.
Not to mention all of the LGBTQIA+ shit that has been shoehorned into Deltarune and all that nonsense, but it was just a good game that got overhyped, and has easily memeable music.