How do I leave this tunnel maze

Hint 1 of 10:

If you find a long eastward tunnel, keep following it.

Hint 2 of 10:

Here is one way out, although you may just blunder through.

Hint 3 of 10:

From the entrance, go down to the first side tunnel.

Hint 4 of 10:

Crawl east to the next ladder, then go down to the next tunnel.