From here go right 3, left 3, then down to the very bottom, collect the key two right. Go 2 left then go up 3 and all the way right to the crumble wall above you (one right of the diamond). Go through that and push the boulder to your right, over the edge. Go one right and two down.
Push the bottom bolder all the way left so it is one right of the sense pad (don’t push it over the edge) go back to the other boulder (go right to the hole in the roof, go up 2, go right 3, down 1, right1, down 2) then push this one 6 to the right exactly, that’s one before the TNT above you, but one after a crumble wall beneath you. Now go one right and down the crumble wall, then left to the balloon. Push the balloon, then go back 1, then push that boulder to the very left as shown in the 3rd picture.