Thanks for the feedback. The idea was to create something between a youtube video and a blog post and something you can consume in bite-sized pieces. I'd like the visuals to do most of the talking but I guess parser combinators came out with a lot of text anway. I'll try to tighten up the UI some and get a smaller phone for testing.
I really enjoyed it and I look forward to trying out the ideas.
I think you are close to every effective presentation format, but the cramped space for the text was the biggest friction. The moving visuals, as helpful as they are, also became a little distracting as I was trying to absorb the meaning of the text. You could solve both issues with a toggle to hide or expand the visual.