Crystal Castles

Jump in the top left corner behind the building toget extra points and advance to level 3-1.

Go to the top right and kill Berthilda. Jump up inthe top right corner and "FXL" will appear.

In Level 5, get the hat and enter the door where Berthilda the witch is flying around. Destroy her and then go over to the corner where she was, and jump. The initials FXL will come up at the lower-right part of the screen. Those are the initials of one of Crystal Castles's designers, Franz Lanziger.

Jump one hundred or more times in the front corner of the very first level. Losing a life doesn't break up your number of jumps. Now, clear the whole level of the gems and at the beginning of Level 2, a banner that says ''ATARI'' will appear.

In level 3, Hidden Ramp stage, get the hat and then go to the back corner of the hidden ramp & jump before the hat wears off. You will warp to level 5.