Cognito levels:
Successfully complete all levels in puzzle mode.
Finity mode:
Complete Endless mode level 280.
Hyper mode:
Complete action level 9.
Twilight mode:
Complete classic level 18.
Original mode: Use
the mouse to move in a clockwise circle on the Classic, Action, Endless
and Puzzle mode selection buttons (in that order) at the menu screen.
Note: Make a circular motion and make sure each is touched by the pointer.
Keep repeating the circular motion until the original mode game begins.