Speak with Toni. Examine Yin lying on the ground. Pick up the item and combine with Yang. Insert the spare part into the nook and then press the button. You can skip this part by pressing the red cross in the right corner of the screen.
Reach the deck, go to the prow and then to the stern. Try to go along the side wall - do that by grabbing the sign. Click on the crane's joint. You need to loosen up the screws - click on the middle one, then on the left (the right screw will fall out), and then twice on the middle screw - the left one will fall out. Finally, click on the middle screw. Stick to Goal during the fall.
Speak with Barry, Rufus' fan. Choose "I'll confuse him with my blackout tactics" option. Click the cannon and the button on the right. Move the lever, choose the option that allows you to increase the speed, and move the lever twice. Take the axe and the rubber tube - they are on the left. Select the tube from your inventory and press the cannon, then click the cannon again. Next, click on the tube, and use the axe on it.