Fly as a cow:
Select the load option from the options menu and enter LLLLLLLLLLLLLL as a password.

Hard difficulty passwords:

Track	Password
1	4XVHBBBCDBCDBG
2	4YVRBBCDFCDDBJ
3	4OWOBCCFGCDDBL
4	41W7BDDGGCDFBN
5	43XGBDDGHCFGBQ
6	44XNBFDHJCFGBS
7	46YZBFFHKDHGBV
8	47Y5BGFJLDHGBX
9	49ZDBHFKLFHGBZ