I just replayed it and you did an awesome job addressing all my points!
The grey filter for the adult mode is a very nice touch and the balloons make it easier to understand and also tie in to the theme nicely. The new sprites are also all very easy to understand.
I had a small issue with the trampoline when replaying where the box bounced of the wall and flew to the left of the level, but it worked on my second try. A nicer graphic for the laser and trampoline would also be nice, and you could maybe consider adding some wires or colour coding for the buttons to make what they affect clearer. Although that’s a matter of taste and having to figure the buttons out yourself works too.
Otherwise I have nothing I can criticize any more, very good work!