those who are stuck on lvl 24 when you get to the bottom: tip, get the first lines of coins and align all those plumbers to the wall, then get the middle line of coins above the switch
super lagging: stage 80+ is so slow, sometimes the enemies just mysteriously "fly" across the board which causes more lagging and unfairness. I played one game of hard and it lagged so much it crashed my internet explorer, so I guess the impossible badge is literally impossible.