sokoban

Sokoban is a widely spread puzzle-class game in which you will have to solve puzzles of increasing complexity. Don't worry, there is no time limit for finishing a level, you will have all the time to solve one. In Sokoban, your task is to collect lost objects and move them onto free storage locations. When you've successfully complete this collection task by filling up all empty storage locations, you're promptly assigned the next one, unless you've solved them all.

Website of the game: http://www.chez.com/powerteam/softs/sokoban/index.html

Here is a list of the different blocks in the game:

	A moveable object. Push them to their storage locations. You may only push objects, not pulling them, and only one object at a time.
	Successfully filled-up storage location, you may still move the object again, if necessary.
	An empty storage location. Push moveable objects upon them.
	Your mover, control it using left, right, up and down arrows.
	The mover above an empty storage location.
	A wall: an unmovable object.
	The ground.