ksokoban
The japanese warehouse keeper game
KSokoban is a type of transport puzzle, in which the player pushes boxes or crates around in a warehouse, trying to get them to storage locations.
Rules:
1. Only one box can be pushed at a time.
2. A box cannot be pulled.
3. The player cannot walk through boxes or walls.
4. The puzzle is solved when all boxes are located at storage locations.
KSokoban original game is available under http://hem.passagen.se/awl/ksokoban/ and was written by Anders Widell, so...