public void setDifficultyFactor(int level) {
		switch (level) {
		case EASY:
			difficultyFactor = EASY;
			break;
		case NORMAL:
			difficultyFactor = NORMAL;
			break;
		case HARD:
			difficultyFactor = HARD;
			break;
		default:
			difficultyFactor = NORMAL;
		}
	}