Easter Eggs
See the Designer's credit
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.
Contributed By: Retro.
See the word ATARI
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.
Contributed By: Retro.
Secrets
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