Type Poison at the "1) Player 2) Players Q)uit" screen.
Press the special jump button, 2442, and the special jump button again during game play.
Press [Esc] during game play.
Type Akces at the "1) Player 2) Players Q)uit" screen.
Press [Tab] when selecting a character.
Type IKE at the "1) Player 2) Players Q)uit" screen. Sound, access to Poison, and clue mode options will become available.
Type ifokvision at the "1) Player 2) Players Q)uit" screen.