foreach(dir
	Art
	Bamboo
	Bath
	Blox
	Brick
	Cake
	Cave
	Castle
	Cheese
	Christmas
	Compost
	Deepspace
	Desert
	City
	CrazyMission
	EarthRise
	Eyes
	Freeway
	Golf
	Halloween
	Hell
	Island
	Jungle
	Nature
	Olympics
	Planes
	Sheep
	Snow
	Stage
	Underwater
	)
	add_subdirectory(${dir})
endforeach(dir)