As soon as the player reaches the end, that ending menu opens up with the final score on it. This menu originally only had "Restart".
I figured people could accidentally instantly press confirm on the "Restart" button (especially with controller) and possibly miss their chance at seeing their final score.
I thus created a second "Null" button, which is automatically first selected, so that the previous problem never occurs.
It is quite literally a button that does nothing when pressed.
It's a messy fix, but that's a game jam for ya :P.