This actually worked for me! I started coding a different part of chapter one and it gave me new ideas about the scene I was stuck at and I finally managed to code that scene too. (:
But I have a new problem. 
My story uses sound and there is this scene where a person is knocking on the door. So I have added sound door_knock to it. There are two such scenes depending on the choices. And I can hear the first knock alright but when it comes to the second knock I can hear it in the portal but not in the app. 
Any suggestions what the problem is?