< says you just need to type your code into the Hall of Fame. Once you do so, it is assumed that you did not use the Infinite Power-up Glitch (uh, even though Cut did?

) or that Alt+F4 trick on PC. If you did use one of those tricks, you will still (obviously) get a valid code, but it should be fairly obvious by an unrealistic score size, and MandM/Xenon will challenge and remove it. If your score is still modest, then I guess nobody can tell what you used, and probably nobody really cares.