I am still writing dialogs for the level 4, the roadmaps changed a lot of things. And I have also discovered some big parts were not done or the position of the boxes was not correct.
After the dialogs are done they will be more art to do for the level I think, maybe animations. For the moment they are a lot of small things to finish before having a correct functional level with the proper endings.
For the moment the dialogs are linear, I try to handle most common cases but after I will handle the other cases and maybe add some choices in the story without adding others endings.
There is no music at the moment, I will add the music after checking all of the levels.