On the main menu, click the password option and type:

Code - Granted Level

9, 7, +, 2, 4, 2, 8, -, 3 - Level 1
4, 8, -, 4, max, grinch, max, x, 2 - Level 2
3, 7, -, 2, 6, 2, cindlylouwho, x, 3 - Level 3
4, x, 0, 2, +, 7, 4, +, 8 - Level 4
max, 4, 6, 0, 6, +, 8, cindylouwho, 9 - Level 5
0, 8, -, cindylouwho, 1, grinch, 8, x, 4 - Level 6
-, x, o, grinch, +, 7, 1, 7, 0 - Level 7
7, 4, 2, 0, 6, +, +, x, x - Level 7:6