How do I get out of here

Hint 1 of 5:

You take the high road, and I'll take the low road.

Hint 2 of 5:

You can't fly... yet.

Hint 3 of 5:

Don't let this grate game get you down.

Hint 4 of 5:

There is a loose sewer grate at the eastern side of the city.

Hint 5 of 5:

Use your hand to open it and descend.