I've found both ways off the big rock

Level 1:

Have you figured out what the controls do?

Level 2:

The levers move the track, the track moves the ball, the ball is in your way.

Level 3:

When you first go through the hole you've found, the ball is blocking your way to the tusk. You need to move the ball with the controls that are under the ladder so you can get into the tusk.

I'm having trouble moving the ball. Can you give me some help?

I've gotten in the tusk, or at least in the doorway...