Part 11

After obtaining the gear, walk to the ledge and throw it to the other brother.

Cross the thin plank of wood by sending the gearless brother over and throwing the gear to him.

With both brothers at the controls, insert the gear into the shaft in front of the lever.

Have each brother grab one of the levers sticking out of a barrel and rotate them to ascend the inventor's platform.

Follow the inventor back to his workplace and have Big Brother interact with him to get permission to use the hang glider.

Behind the inventor's deck, find the stairs leading to a windpipe.

Have Little Brother operate the lever on the side, and Big Brother grab the bar below the windpipe inside the circle.

Interact with the levers and move them to produce sound and obtain the "Windpipe" achievement.

As you descend towards the hang glider, locate the rusty telescope on the railing.

Look through the telescope and move your view southeast until you see two birds on a branch to obtain the second part of the "Love Birds" achievement.

Interact with the hang glider with both brothers; they will grab the bar below it. Ensure you hold onto both brothers' interact buttons at all times to prevent them from falling.

To steer the hang glider, reposition your weight by moving the brothers to either side. More weight on one side will cause the glider to veer in that direction.

Fly straight ahead past the cave; a flock of birds will damage the hang glider. Do not attempt to land by flying into the pillar on the left, as this will cause a crash and require a restart.

Wait for the cutscene (a non-interactive cinematic the game plays automatically) to trigger after flying straight ahead.

The glider will crash on a small platform. Big Brother will point to vines and metal handles on the wall.

Tie yourselves together with a rope and begin climbing the tower.

Climb the vines, then have one brother jump to the metal handles.

To swing, let one brother dangle while the other holds onto a metal handle. Keep the trigger down for the brother holding the handle to avoid falling. Little Brother can hold Big Brother's weight.

While one brother holds the handle, rotate the other brother's joystick to swing him side-to-side until he can grab the next metal handle. Release the previous brother and continue this process.

Reach a wooden plank, have one brother swing up, and then both swing across.

At the end of the wooden plank, encounter jutting wood ends. Swing one brother to a higher wood end (not the horizontal one) and ascend three wood ends before swinging left to another wood plank.

At the next wood plank, sidle across until the camera pans, indicating you can't go further.

Swing Little Brother to the metal handle to the left, swinging through a crevice in the wall. Get as close to the handle as possible before swinging.

From there, swing over to the vines and climb up to level ground. You can release the trigger buttons.

Walk to the bronze gate. Climb the gilded gate and, at its highest gilded point, jump to the grabbable ledge.

Sidle to the right while still grabbing onto this ledge.