Enter the word SPECIAL or SEGA on the name entry screen, now you will be bullet proof and also get 3 extra lives when the timer runs out.
To start the game as a car, with all letters collected, and a full set of powerups, enter your name as DOKI PEN.
Get 3 extra lives after the timer reaches 0
Enter your name as GP_WORLD at the name entry screen.
All the letters collected
In the name entry scrren, enter your name as 'HANG_ON ' to have the letters A, B, C and D collected!