conundrum
abstract
arrange
background
block
bright
building
concept
connection
construct
construction
corridor
create
creative
creativity
cube
dark
door
doorway
dream
element
enter
entrance
exit
figure
freedom
gate
geometric
geometrical
hope
idea
imagination
indoor
inside
life
light
logic
opportunity
passage
piece
shape
solution
square
success
symbol
tetris
texture
wooden