TMHT 2 - The Arcade Game

10 extra turtles:
On the title screen, on control 1, press Up, Right, Right, Down, 
Down, Down, Left, Left, Left, Left, B, A and Start.

Level select:
At the title screen, press Down five times, Right seven times, B,
A then Start.

Extra lives and level select:
To begin with 10 lives and have the option to choose the start 
level, press the following when on the title screen: B, A, B, A, 
Up, Down, B, A, Left, Right, B, A and Start.