You should add the link to the Next Lesson at the bottom of the page (or have use a fixed layout as you scroll down). I got to the end of Chapter 0 and was read

You should add the link to the Next Lesson at the bottom of the page (or have use a fixed layout as you scroll down). I got to the end of Chapter 0 and was ready to move on, but I couldn't find the Go To Next Chapter button without looking around.