There were so many things on the screen like arrows and text and there were too many pages. At the first time it was very overwhelming and I thought how should I remember all this stuff but on the second time it wasn't actually that much and pretty easy to remember. I think its the first impression that makes it not so easy to understand. Maybe make smaller steps or make the tutorial interactive, without a instruction page.
In my games I try to avoid tutorials and make everything as intuitive as I can. Maybe try this approach too and see how it goes