I know this sounds crazy, but I say we push the red button.
Cache button is red again, after metal rod was removed from hole. Green button allowed him to open passage to lower room, but now he wonders what red button does...
As mr. Stick stated before, he likes green color more than red.
For some reason... red colored buttons make mr. Stick shiver a very little...
Or maybe he overplayed and overwatched a lot of action games and movies, where red color is "bad color".
He made his decision and presses the button...

...
Nothing happens.
Maybe red color means that button is just deactivated.