Crystal Castles

HIDDEN MESSAGE: Designers initials - On level 5 (Berthilda’s Palace), grab the hat and enter the large door where Berthilda is. Run over her (for 3,000 points) and go to the corner of the room where she was and JUMP. The initials FXL will appear in the lower right-hand corner of the screen (for Franz Lanziger).
Atari banner trick - On screen 1, trap the balls in the middle square, then go back to the lowest corner in the maze and jump continuously until you’ve lost 2 lives, then clear the maze. The banner will appear on the next screen.

Warp Tunnel - A door appears at the start of a new game. Go through it and press JUMP- warps you to previous level in last game (1st maze of any level needs to be complete).
Secret Warp Tunnels - Level 1 to Level 3 warp -- go to back left-hand corner and press JUMP. Level 3 to Level 5 -- get the magic hat and JUMP in rear corner of hidden ramp. Level 5 (3rd maze “Crossroads”) to Level 7 - go to back left-hand corner of top wall and JUMP.
The final level is 10-1 (The End). If you finish the level, the screen will fill with various objects.