McDonaldland

Cheat mode:
Type spicy beanburger or kid at the one or two player selection screen.
The character will jump up and down to confirm correct code entry.
Press one of the following keys during game play (except while at the map screen) to activate the corresponding cheat function.

Key             Effect
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[Equals]        Additional lives
[Keypad Enter]  Get a card
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Additional bonus room attempt:
Press Fire after falling down to the exit of a bonus room, to open it.
Then, press P while the exit is open to try the bonus room again.