Make sure to check changelogs for any new changes!
The Green Arrow is an arbitrary entity that is found in any level that has high or hidden hazards.
The arrow will randomly go any explorer in a high hazard level but will typically target those who are paranoid or desperate.
It will allows be above your head and will point in the direction it wants you to go in, please DO NOT follow the arrow as it is leading you to a harmful trap.
It will vanish after 10 minutes of disobeying it, targeting another explorer around a 1/15 chance per hour, and the process repeats from there.
It is a floating green arrow that will rotate in the direction of a hazard, for example, in Level 266 it may mislead you to walk over a trap. (Since walking is a dangerous hazard in said level)
Let it sit on your head, but do not move where it points.
Follow the arrow (this is almost common sense but those desperate easily fall for this)