Semi Frequent Undertale Facts's tweet - "* In Deltarune, there is a puzzle in the Scarlet Forest which has you run around a big tether hazard to make the room darker so
Forest - Deltarune: Chapter 1 and 2 Walkthrough - Neoseeker
DeltaRune p.4 : Puzzles with switches everywhere! - YouTube
Out of bounds in the forest on the save point just before the castle : r/ Deltarune
Great Board | Deltarune Wiki | Fandom
How to Unlock the Secret Boss in Deltarune | Attack of the Fanboy