The game takes place inside a building which will be represented as a grid of 81 squares, every square representing a possible position for different entities in the game (player's avatar, enemies, power-ups), with the exception of 9 special squares which represent rooms, and are equally distributed on the grid.  The player's character is a spy that is tasked with retrieving a briefcase containing classified enemy documents, which is located in one of the rooms. There's a few caveats:  The building is pitch-black. There are six ninja-assassins patroling the building. The spy is initially placed at the bottom left-corner of the grid. The ninjas are randomly located across the grid, with the limitation that they must be, initially, at least 3 squares afar from the spy's initial location. The briefcase is randomly located in one of the nine rooms at the start of the game. The rooms can only be accessed from the north side.