At the "loading" screen, you can stop the spinning X by tapping UP repeatedly. You must play with the timing to get it right.

Circuit Level:
X, O, X, TRIANGLE, TRIANGLE, SQUARE.

Enter Square, Triangle , X, Square, Circle, Circle as a password.

Enter Triangle, X, Square, X, Triangle, Circle as a password for the Super Circuit and Ollie B.

Enter Square, X, Triangle, Square, Circle, Circle as a password.