Spoilers?
So I did the no love route. I see sans through the hall, and then we battle, right? So, when he showed me his special attack, I died in an instant. That's meant to happen? And when I die, I keep spawning in the place, the hall, this looks like an endless loop, I don't know if this actually how it goes.
But anyway, this game is very amazing, I loved it a lot.