Assuming you have been stuck there like I was, there is a trick to this
Notice each button has a specific size
And now notice that if you explore, you find a "heavy barrel" (visible by holding ALT)
Elsewhere, there are mines, and where mines are.. are buttons
One of the buttons requires you to place a candle on it... the other a water bucket
This should make it fairly easy (I was stuck there like 30 minutes ,p)
