What can I do here?

Hint 1 of 5:

Pick up the machete.

Hint 2 of 5:

Talk to the dog, Duke.

Hint 3 of 5:

Talk to the cat hitched to the sesame cart.

Hint 4 of 5:

Visit the underground Cat Ruins.

Hint 5 of 5:

Talk to the dog driving the sesame cart