No reaction to my tips? Please take some time for feedback.

Just FYI I am a civil engineer (construction).

Since you explicitly ask for feedback, some comments:

• I have been watching on a retina screen (Surface Pro), but I got both vertical and horizontal scrollbars. If this is a non-responsive project, please publish to scalable HTML5 to avoid this.  There is a typo ‘contruction’ instead of ‘construction’ on the first slide.
• Was stuck on the first slide, because it has no Next button. Until I scrolled down and used the playbar. Mixing up playbar for some slides and custom navigation on most slides?
• Very little interaction, maybe it is still a draft.  Personally for that amount of text, I would at least try to diversify, use effects or multistate objects to have not all test appear at once in a slide. Try to use audio for full text, and limit the amount of text on the screen. Use drag&drop to present small portions of text etc. Not always the same image, please… There is supposed to be a difference between a text book and eLearning course. Try to screen it as if you were the learner: is this engaging or is it boring?