How do I get past the yellow spider in the middle?

Hint 1 of 5:

You may not be able to tell, but the thread that the spider is hanging
on is connected to other threads on the screen.

Hint 2 of 5:

Each of those threads is in the upper-left corner.

Hint 3 of 5:

To get there, you'll need to have one of the goblins climb up.

Hint 4 of 5:

Only Warrior can climb.  Have him climb the thread that the yellow spider
is hanging on, and you'll get up there.