What do I do in the air realm?

Hint 1 of 17:

Try shooting the cannon.

Hint 2 of 17:

As you might have guessed, your goal has something to do with the tornado.

Hint 3 of 17:

When you first enter this realm, you probably won't have much luck hitting
the tornado -- it's too good at avoiding the red beam the cannon shoots out.

Hint 4 of 17:

But that's only because you haven't set the cannon properly.

Hint 5 of 17:

Have you tried looking down from this screen?

Hint 6 of 17:

Look through the pipe and you'll see some balls on a grid.  These balls
control how the cannon shoots.

Hint 7 of 17:

The cannon can shoot up to 9 beams, in a pattern determined by how the balls
are arranged on the squares in the center of the grid.

Hint 8 of 17:

In other words, if there's a ball in one of those nine squares, the cannon
will shoot out a beam in the same place on a 3x3 grid.

Hint 9 of 17:

You actually don't want to hit the tornado itself.

Hint 10 of 17:

All you want to do is trap it.