You landed somewhere in Deponia. There's a fair going on, neat! Go explore. You will find the love tunnel. Your goal is to get the boat.
Unlike normal walkthroughs, in Nice Game Hints you can select just the puzzle you want hints for. Here are listed the puzzles for "Fair" in Deponia Doomsday. The guide you choose only contains information about that puzzle, reducing possible spoilers for other puzzles.