I know what to do to get the ferry to move, I've done it before. The problem is, I got a new operating system and so had to restart the game (which isn't the problem itself) and for some reason this part isn't working.
When I click on Kidbot to get her arrow and then move it to the lantern that she needs to knock down the arrow disappears. It doesn't matter what angle I try it from, the arrow simply disappears and I can't click on anything.
I don't know if it's a bug or what.