This shape will break if three or more shapes are placed on top of it. The current load is indicated by the color on its front. Green indicates no shape lies on top of it. Red indicates any additional weight will break it.

This shape has a limited lifetime and breaks once the timer on its front runs out. The timer starts when another shape is placed on top of it.

You will not lose a level if a special shape breaks. Some levels cannot be solved unless certain shapes are broken.