This level is about getting the hang of flinging. Remember, it's (shift + direction key) to fling.
Spoiler: Hint 2
It's also about getting you used to the third dimension in The Godkiller. Keep climbing the staircases.
Spoiler: Hint 3
You'll need to fling from ledge to ledge across the corridor to reach some staircases.
Spoiler: Hint 4
Keep climbing until you find a corridor that leads north. That will take you to the exit.
Spoiler: Hint 5 (solution diagram)
Stand on each numbered circle and fling in the indicated direction to climb the Unremarkable Corridor.
Follow the numbered steps in the accompanying picture to reach the exit. Climb to spot number 1, fling east, walk to number 2, etc.
Present solution
Spoiler: Hint 1 (present location)
Finding the present is the tricky part. Scout around all the edges of the rooms.
Spoiler: Hint 2
The present is near the exit.
Spoiler: Hint 3 (solution)
The present is found just south of the exit. The balcony above obscures the view of the passage until you get close. From the exit, just walk south and you'll find it.