Bonus ending:
Successfully complete the game with over 70 Red Gems to view a special ending.

Level select:
Highlight the "Options" selection at the title screen and press Start. Press L, R, Start, Select, X, Y, A, B on controller two. A chime will confirm correct code entry. A level select option will appear above the start option on the title screen. Hold L + R and press Up or Down to select the level, and Left or Right to select the section.

Bonus lives:
Press B when the Genie blinks during the bonus levels for one or two extra lives.

Bonus round:
To always reach the bonus round, stand on the open treasure chest and leap for the fluttering Scarab. Once the bonus round is accessed, wait until the Genie blinks while the wheel is spinning and tap any of the buttons. This will result in an extra life almost every time.