Go to the passwords screen and enter the following:

Password	Effect
1985	Level 1
8316	Level 10
6402	Level 11
9874	Level 12
1930	Level 13
2623	Level 14
6385	Level 15
7749	Level 16
3278	Level 17
1039	Level 18
9002	Level 19
3698	Level 2
2878	Level 20
3894	Level 21
4913	Level 22
2825	Level 23
7406	Level 24
5289	Level 25
0257	Level 3
3745	Level 4
7551	Level 5
8790	Level 6
5196	Level 7
4569	Level 8
8091	Level 9