Collect at least 35 perfect zone gems.
Collect at least 45 perfect zone gems.
Collect at least 50 perfect zone gems to unlock the Cairo level.
Collect at least 60 perfect zone gems.
Collect at least 65 perfect zone gems.
Collect at least 78 perfect zone gems.
During gameplay, hit [Esc] and quit. Then go to Replay Level,
Bonus Game Modes, and it will prompt you for a password/code. Enter
any of the following: