public void setExits(Room north, Room east, Room south, Room west, Room top, Room bottom) {
        if (north != null) {
            exits.put("north", north);
        }
        if (east != null) {
            exits.put("east", east);
        }
        if (south != null) {
            exits.put("south", south);
        }
        if (west != null) {
            exits.put("west", west);
        }
        if (top != null) {
            exits.put("top", top);
        }
        if (bottom != null) {
            exits.put("bottom", bottom);
        }
    }