Level 28
Hit the switch by going down. Then go down pass the horizontal door and then do the following moveset:
l = left, r = right, u = up, d=down, Number = number of spaces
l1
u1
r1
d1
u1
l1
d1
r3
Go down and around to the LEFT, and apply the same moveset, instead this time, instead of going down, go LEFT to open the door next to the striped panel, then go down and around, then up and follow your way to open up the door next to the exit. retrace your steps back to the furthest left door. open it, go right once, open the switch by going up, go left, down, and right all the way to the exit.
Level 3
The first thing you need to do is push open that gate above the bottom-left corner. Go back around, open the gate in front of the exit, then go around again to escape.
Level 9
Go clockwise through Northwest door. Continue clockwise through East lever to Southeast door. Pull Southeast door open, but go back counter-clockwise, flipping East switch up. Door to exit is now open. Follow outer-most path counter-clockwise to exit. 39 moves.