Since the game sort of just throws you into it, we will explain how to progress and ultimately beat the game. In each chapter you are assigned three “ark missions,” which can be seen by tapping the progress bar at the top right corner of the screen.
Before you can continue your adventure, you will need to ensure your raft is suitable for long-distance sailing. The three ark missions you get are focused on building up your raft, so completing all the missions should be your main priority.
Once you do, you may have to keep building a little bit afterwards, but soon enough your raft will be completed and you can complete the chapter.
If you are ever unsure of what to work towards next, looking at your ark missions is a good place to start. Also, as you complete missions, the progress bar will fill up to show you how close you are to finishing the chapter.
If there are multiple parts to a chapter, there will also be stars underneath the progress bar. When you first one section, you will receive a star. Get all stars to finish the chapter!