Decorations
Decorations are simple decorative objects that have existed since Return To Wonderland. They cannot be walked through, pushed, or collected, but most of them can be used as an alternative for walls in cases where the level designer does not wish to use walls. All decorations act as an unwalkable 1x1 wall, even ones that take up more than one tile in width and height, such as trees and houses.
Decorations include mushrooms, houses, trees, flowers, birdbaths, statues, rocks, fountains, pillars, pyramids, streetlamps, big boxes, and snowmen.