At What Point Is Inspiration Too On The Nose?
I'll preface this by saying it doesn't really bother me. I think looking for complete originality is a bit extreme and impossible. Historical settings reference real history (usually) most fantasy settings will ape off what came before, and there's nothing wrong with being inspired by what came before. But... there's a lot of it in Deltarune. Maybe a little too much?
Toby is pretty open about being very heavily inspired by many things, one chief among them being the Mother franchise. Did you know that Dark Fountains are... well a bit of a reverse of the Needles from Mother 3? In Deltarune the Dark Fountains are made by stabbing the ground with something sharp, and pulling the item out. This causes it to shoot out a pillar of light that then spews dark smoke and creates a Dark World. In Mother 3, the Needles are golden needles in the ground which when pulled, produce a flash of light followed by a gentle flow of dark smoke. They're both even related to the creation of a 'world' though in Mother 3 it takes every needle being pulled to actually do it.
There's other, more obvious stuff too. The punch-out fight in Chapter 2, all of the + shaped bomb explosions are clearly inspired by Bomberman, Chapter 3's Legend of Zelda esc boardgames, and while I'm not sure it can be called a direct inspiration the platforming in Chapter 5 reminded me of Paper Mario, with Susie and Ralsei serving as your 'partners' using abilities to open the way.
And for a more subtle thing... the Tail of Hell and the poor children, while it has yet to be properly explored, reminds me of the intro for Breath of Fire 2, where the young Bow and Ryu follow a spiked tail into a cave, only to come face to face with a demon, and nearly killed. There are probably more that I can't remember or don't know the references for.
So I ask... at what point do they get too on the nose? Because it doesn't bother me, but it does seem like there's a lot of inspiration being drawn from varied sources, and that might be a contributing factor in the way the game changes chapter to chapter. For better or worse.