Also, make sure the door has enough room to open. The masterswitch in conjunction sets off the sector effector sprite that it is paired with it in each sector that is to be affected by the earthquake. Give the touchplate and all masterswitches in the earthquake the same unique lotag. Give all S.E. sprites a lotag of 2. Each sector will move in the direction that the S.E. sprite is pointing.
Vents are very similar to windows, except vents are actually sprites.
First make your vent shaft, then place a sprite where you want the vent to go. Nuke buttons are one of two ways to end a level. Another way to end a level is to give a sector a lotag of 65535, which will make the level end when the player steps on that sector. Also give the S.E. sprites a lotag of 13. Sometimes, this problem is simply because the ceiling is up too high, or the floor down too low.