Cheat Option
Intentionally run out of lives during gameplay. Then at the High Score screen, press A, B, A, B, Select, Start. The Cheat Option will now appear on the Main Menu.
Stop traffic and turtles
While playing a game, press A, B(2), Left, Right, Up, B, A to stop traffic and keep the turtles from sinking. If you entered the code correctly, a traffic light will appear.