In this level your first 2 gates you just have to make sure you keep the eyes on the screen and it will open the gate's for you
When you get outside just look at the eye again which you will see on the right hand side.
Now you will be inside another building with a big stair case, go all the way to the bottom of the stairs then look up to roof you will find another eye which when you look at will open the door.
In the next room you will find a lot of book shelf's if you pull the first one on the left as far as you can then go down to the door and turn to look at it the eye on it will open the door and you can walk backwards through it
Finally the last room you get to will have 3 pillars and a leaver at the end of the hall, if you pull that leaver about half way you will be able to stand at the last door and look through the two holes in the other pillars to see the eye which opens the last door for you to finish the level
I have included a video guide I made below