Reverse Dream/guide

Wheel Effect
Bottom left door, go right until traffic lights, interact for effect. This is arguably the first effect you should get.

Razor Effect
Bottom right door, travel south west, then south when you reach the junction. Follow the route east, then continue east at the next junction. Upon reaching the next fork in the road, take the turn south. Continue until you reach the pole tied with blue ribbon. This pole, when interacted with, will place Guratsuki in the water where you must find the corresponding green pole. Once found, the green pole will take you to a gate to the Gore World. In this small area, travelling approximately north east will you will find a small blue object on the ground. Interacting with it will give you the Razor effect.

Melt Effect
Follow the instructions to the Razor effect, except instead of interacting with the blue pole, travel past it until you reach 3 bright blue teleporting triangles. Interact with the farthest one and follow the route until you hop down a hole into the Ocean. Travel north east from here until  you see a pink coral-looking object. Interact with it for the effect.

Noose Effect
Bottom left door, go left until you enter a dark area. Go through the door and travel all the way to the right until you reach an area with a single door. Go through and interact with the toppled chair to get the effect.