Be careful, because you can miss the chance to do this.
In Original mode, once you've gotten a high score and you enter your initials, you will see the high scores. A screen will pop up asking if you want to post online.
Press
. Yes, you can miss this here.
If you miss it (like I did), go into the Original game menu (press
), go to Game Settings, and select "Reset scores and rankings." Then play through the game until you top the table high score (around 105,000), then die again. You'll be able to enter the score in again.