I am on level 126 of the game and enjoying it very much. Unfortunately, I cannot proceed because there is a bug in the game such that I cannot pick up the valve or the brush as I am supposed to do. They are not highlighted by the magnifying glass. This is a known bug and documented on this thread:
http://www.gameboomers.com/forum/ubbthreads.php/topics/889287/all/Playrix
The commenters on the above thread were eventually provided with a bug-free version of the game.
I'm wondering whether the giveaway was the defective version of the game. Is anyone else stuck at this level?