You need to go to the far right side of left of the question mark, as the right is going to lead to a room with no water and death. If you keep hitting the 2 by 2 just try to go on the bottom of the first 2 by 2 and then go on the top of the second 2 by 2 using (the key you run in MC). Exemple mine is shift so use that key you run with in mc and you need to hold D right after the fist 2 by 2 :) hope this helps.